- Updating changelog for next release

- Fixed l10n_client support, added missing strings for translation, by miro_dietiker, khaled.zaidan, #304434

- Fixed maxlength, for node translation autocomplete, by cedrid, #802418

- Fixed: Make menu title translatable (blocks), by moritzz, #356375

- Moved i18n_test module to "Testing" package, #799730

- Restore back function tt() to prevent "Fatal error: Call to undefined function tt()" in other modules, by markus_petrux, #358839

- Deleted obsolete functions tt() and to(). Replaced by i18nstrings() and i18nstrings_update()

- Completed i18nstrings API cleanup

- Some clean up to i18nstrings API: Dropped update option from i18nstrings_translate()
- Disable content selection during synchronization, by Pisco, #648348

- Fixed: Views content negotiation filter not working, by markus_petrux, #650552
- PHP 5.3 compatibiliby issue, by Berdir, #623138

Updated some string translation functions in i18ncontent
Fixed minor issues with i18n and settings forms

- Fixed: Checkboxes fields are not translating in profile view pages, by neochief, #520692

* Use db_add_field() for update_6000.

"uk-ua" is absolete tag for Ukrainian translations, "uk" is correct, so removing useless translations.

* Filename cleanup
* Splitted PO files in main translation folder

- Fixed i18nstrings, wrong hook_schema_alter() implementation, by rsvelko, #466876