- Cleaning some module dependencies and old code.

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

- Added node language options:
  - Default to current language
  - No language neutral
  - Lock language once created

* Filename cleanup
* Splitted PO files in main translation folder

- Changed i18ntaxonomy module weight for it to run before views, by Owen Barton, #386136

- Fixed node author field in i18nsync (author -> name), by mfb, #399216
- Fixed synchronization for nodereference fields, by dasjo, #242601
- Fixed: Unterminated entities in taxonomy module break page validation, by ao2, #478856

- Added new dependence (i18ntaxonomy) and some taxonomy handling to i18nviews

- New feature: allow to select existing node as translation, #295682

- Fixed: translated node forgets its menu settings, by brucepearson, #364375
- Fixed: missing node languages for LANGUAGE_SUPPORT_EXTENDED_NOT_DISPLAYED, by Roger Lopez, #365574

- Fixed: locale table growing on each request, issue with i18nstring_textgroup(), by drifter, #359249

- Fixed: taxonomy strings not properly synchronized (removed), by stella, #356542

- Added some more help text and links to the taxonomy admin pages.
- Rolled back nodereference patch, previously committed by mistake, #314721

- Fixed issue with file sync list option, by nkoponen, #298327
- Added clean up feature to i18nstrings refresh

Updated German translation (100% complete).

- Added some help texts for i18nstrings and warnings about the site default language, #314035

- Fixed / improved some module help texts.
- Fixed multiple localization issues, by hass, #310852

- Fixed warning in sync module, by vjacquin, #299064 and #294511
- Fixed issue with i18nblocks and system module weights, #299642
- Fixed warning in i18ntaxonomy, by mvc , #304003

- Added back CCK syncronization, by drewish, #293019
- Added new 'mixed' language selection option, by ablivio, #203798