- Completed i18nstrings API cleanup

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

- Added compatibility with ctools page manager, by Kars-T, #698942
- Added support for taxonomy_override_selector, by hefox, #619726

- 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: Translated primary and secondary links appear even if they are disabled, by yrocq #631388

- Added: Primary and secondary links' menus translation using preprocess, by neochief, #514108

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

- Fixed i18n Filter in Views results in SQL Error, by markus_petrux, #522162

- Cleaning some module dependencies and old code.

- Added: Translated taxonomy tokens by Hugo Wetterberg, googletorp, #344794
- Fixed: Global variable corruption by etzel, #580280

* Use db_add_field() for update_6000.