Added support for translations (localization) (see #3559).

* readDataFile, readDefaultDataFile, getReferenceDocx,
  getReferenceODT have been removed from Shared and
  moved into Class.  They are now defined in terms of
  PandocMonad primitives, rather than being primitve
  methods of the class.

* toLang has been moved from BCP47 to Class.

* NoTranslation and CouldNotLoudTranslations have
  been added to LogMessage.

* New module, Text.Pandoc.Translations, exporting
  Term, Translations, readTranslations.

* New functions in Class: translateTerm, setTranslations.
  Note that nothing is loaded from data files until
  translateTerm is used; setTranslation just sets the
  language to be used.

* Added two translation data files in data/translations.

* LaTeX reader: Support `\setmainlanguage` or `\setdefaultlanguage`
  (polyglossia) and `\figurename`.

2 files changed, 38 insertions, 0 deletions

diff --git a/data/translations/en.trans b/data/translations/en.trans
new file mode 100644
index 000000000..0bdc172af
--- /dev/null
+++ b/data/translations/en.trans
@@ -0,0 +1,19 @@
+Preface: Preface
+References: References
+Abstract: Abstract
+Bibliography: Bibliography
+Chapter: Chapter
+Appendix: Appendix
+Contents: Contents
+ListOfFigures: ListOfFigures
+ListOfTables: ListOfTables
+Index: Index
+Figure: Figure
+Table: Table
+Part: Part
+Page: page
+Proof: Proof
+See: see
+SeeAlso: see also
+Cc: cc
+To: To
diff --git a/data/translations/fr.trans b/data/translations/fr.trans
new file mode 100644
index 000000000..a1415d846
--- /dev/null
+++ b/data/translations/fr.trans
@@ -0,0 +1,19 @@
+Preface: Préface
+References: Références
+Abstract: Résumé
+Bibliography: Bibliographie
+Chapter: Chaptire
+Appendix: Annexe
+Contents: Table des matières
+ListOfFigures: Table des figures
+ListOfTables: Liste des tableaux
+Index: Index
+Figure: Fig.
+Table: Tab.
+Part: partie
+Page: page
+Proof: Démonstration
+See: voir
+SeeAlso: voir aussi
+Cc: Copie à
+To: