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

I didn't use any translation limits, everything was added!

@laanwj It seems https://github.com/bitcoin/bitcoin/blob/master/doc/translation_process.md#fetching-new-translations does not work for me, as ``ls src/qt/locale/*ts|xargs -n1 basename|sed 's/\(bitcoin_\(.*\)\).ts/<file alias="\2">locale/\1.qm<\/file>/'`` gives me an error in the MinGW shell :-(.