Add built-in citation support using new citeproc library.

This deprecates the use of the external pandoc-citeproc
filter; citation processing is now built in to pandoc.

* Add dependency on citeproc library.
* Add Text.Pandoc.Citeproc module (and some associated unexported
  modules under Text.Pandoc.Citeproc).  Exports `processCitations`.
  [API change]
* Add data files needed for Text.Pandoc.Citeproc:  default.csl
  in the data directory, and a citeproc directory that is just
  used at compile-time.  Note that we've added file-embed as a mandatory
  rather than a conditional depedency, because of the biblatex
  localization files. We might eventually want to use readDataFile
  for this, but it would take some code reorganization.
* Text.Pandoc.Loging: Add `CiteprocWarning` to `LogMessage` and use it
  in `processCitations`. [API change]
* Add tests from the pandoc-citeproc package as command tests (including
  some tests pandoc-citeproc did not pass).
* Remove instructions for building pandoc-citeproc from CI and
  release binary build instructions.  We will no longer distribute
  pandoc-citeproc.
* Markdown reader: tweak abbreviation support.  Don't insert a
  nonbreaking space after a potential abbreviation if it comes right before
  a note or citation.  This messes up several things, including citeproc's
  moving of note citations.
* Add `csljson` as and input and output format. This allows pandoc
  to convert between `csljson` and other bibliography formats,
  and to generate formatted versions of CSL JSON bibliographies.
* Add module Text.Pandoc.Writers.CslJson, exporting `writeCslJson`. [API
  change]
* Add module Text.Pandoc.Readers.CslJson, exporting `readCslJson`. [API
  change]
* Added `bibtex`, `biblatex` as input formats.  This allows pandoc
  to convert between BibLaTeX and BibTeX and other bibliography formats,
  and to generated formatted versions of BibTeX/BibLaTeX bibliographies.
* Add module Text.Pandoc.Readers.BibTeX, exporting `readBibTeX` and
  `readBibLaTeX`. [API change]
* Make "standalone" implicit if output format is a bibliography format.
  This is needed because pandoc readers for bibliography formats put
  the bibliographic information in the `references` field of metadata;
  and unless standalone is specified, metadata gets ignored.
  (TODO: This needs improvement. We should trigger standalone for the
  reader when the input format is bibliographic, and for the writer
  when the output format is markdown.)
* Carry over `citationNoteNum` to `citationNoteNumber`.  This was just
  ignored in pandoc-citeproc.
* Text.Pandoc.Filter: Add `CiteprocFilter` constructor to Filter.
  [API change] This runs the processCitations transformation.
  We need to treat it like a filter so it can be placed
  in the sequence of filter runs (after some, before others).
  In FromYAML, this is parsed from `citeproc` or `{type: citeproc}`,
  so this special filter may be specified either way in a defaults file
  (or by `citeproc: true`, though this gives no control of positioning
  relative to other filters).  TODO: we need to add something to the
  manual section on defaults files for this.
* Add deprecation warning if `upandoc-citeproc` filter is used.
* Add `--citeproc/-C` option to trigger citation processing.
  This behaves like a filter and will be positioned
  relative to filters as they appear on the command line.
* Rewrote the manual on citatations, adding a dedicated Citations
  section which also includes some information formerly found in
  the pandoc-citeproc man page.
* Look for CSL styles in the `csl` subdirectory of the pandoc user data
  directory.  This changes the old pandoc-citeproc behavior, which looked
  in `~/.csl`.  Users can simply symlink `~/.csl` to the `csl`
  subdirectory of their pandoc user data directory if they want
  the old behavior.
* Add support for CSL bibliography entry formatting to LaTeX, HTML,
  Ms writers.  Added CSL-related CSS to styles.html.

1 files changed, 64 insertions, 0 deletions

diff --git a/test/command/biblatex-online.md b/test/command/biblatex-online.md
new file mode 100644
index 000000000..97706c890
--- /dev/null
+++ b/test/command/biblatex-online.md
@@ -0,0 +1,64 @@
+```
+% pandoc -f biblatex -t markdown -s
+@comment{adapted from http://mirrors.ctan.org/macros/latex/contrib/biblatex/doc/examples/biblatex-examples.bib}
+
+@online{markey,
+	Annotation = {An online entry for a tutorial. Note the format of the date field (yyyy-mm-dd) in the database file.},
+	Author = {Markey, Nicolas},
+	Date = {2005-10-16},
+	Hyphenation = {american},
+	Sorttitle = {Tame the Beast},
+	Subtitle = {The {B} to {X} of {BibTeX}},
+	Title = {Tame the {BeaST}},
+	Url = {http://tug.ctan.org/tex-archive/info/bibtex/tamethebeast/ttb_en.pdf},
+	Urldate = {2006-10-01},
+	Version = {1.3},
+}
+
+@online{CTAN,
+	Annotation = {This is an online entry. The \textsc{url}, which is given in the url field, is transformed into a clickable link if hyperref support has been enabled. Note the format of the urldate field (yyyy-mm-dd) in the database file. Also note the label field which may be used as a fallback by citation styles which need an author and\slash or a year},
+	Date = 2006,
+	Hyphenation = {american},
+	Label = {CTAN},
+	Subtitle = {The {Comprehensive TeX Archive Network}},
+	Title = {{CTAN}},
+	Url = {http://www.ctan.org},
+	Urldate = {2006-10-01},
+}
+
+^D
+---
+nocite: '[@*]'
+references:
+- accessed: '2006-10-01'
+  annote: 'An online entry for a tutorial. Note the format of the date
+    field (yyyy-mm-dd) in the database file.'
+  author:
+  - family: Markey
+    given: Nicolas
+  id: markey
+  issued: '2005-10-16'
+  language: 'en-US'
+  title: 'Tame the BeaST: The B to X of BibTeX'
+  title-short: Tame the BeaST
+  type: webpage
+  url: 'http://tug.ctan.org/tex-archive/info/bibtex/tamethebeast/ttb_en.pdf'
+  version: 1.3
+- accessed: '2006-10-01'
+  annote: 'This is an online entry. The [url]{.smallcaps}, which is
+    given in the url field, is transformed into a clickable link if
+    hyperref support has been enabled. Note the format of the urldate
+    field (yyyy-mm-dd) in the database file. Also note the label field
+    which may be used as a fallback by citation styles which need an
+    author and/or a year'
+  id: CTAN
+  issued: 2006
+  language: 'en-US'
+  title: 'CTAN: The Comprehensive TeX Archive Network'
+  title-short: CTAN
+  type: webpage
+  url: 'http://www.ctan.org'
+---
+
+
+```