Translations update: pull from Transifex

- added languages in bitcoin.qrc: bs, ca, cy, eo, gu_IN, hi_IN, ja, la,
  lv_LV and th_TH (some translations files were already in src/qt/locale
  but not added in the .qrc file
Merge pull request #2482 from Diapolo/TX-pull

Translations update: pull from Transifex