i18n 7.x-1.9

Maintenance release, multiple bug fixes:
- Issue #2031625 by zterry95: Fix code format in function i18n_taxonomy_enable().
- Issue #2015749 by bojanz: Extend support for contrib field types.
- Issue #1961750 by jibran: Fixed Unable to translate field label and description containing html tags/entities.
- Issue #1964006 by jweowu: Fixed Don't use flag with node_load().
- Issue #1970236 by jweowu: Fixed Flush affected nodes from the entity load cache after direct database updates.
- Issue #1830756 by mordonez | jiapei100: Notice: Undefined index: i18n_mode() in i18n_menu_item_get_language()
- Issue #1902018 by blackdog: Fixes some broken code comments.
- Issue #1904368 by attiks, mongolito404, martins.bertins, rutcreate, bojanz, lucor: Fixed [7.x-1.8 regression] Field translation fails...
- Issue #2001818 by bvanmeurs: Fixed Support other node types than 'basic page' in node creation and translation in test cases.
- Issue #1910458 by Simon Georges: Remove useless files[] directive from .info files.
- Issue #1784512: Fixed missing documentation for hook_i18n_field_info().
- Issue #1889878 by Jose Reyero | Berdir: Fixed Call to a member function format_translation() on a non-object in i18n_string().pages.inc...