Also, the previous translations of the words 'tag' and 'merge' were
changed. Added translation of the 'Tool' submenu.

Thanks go to Alexander Gavrilov and Dmitry Potapov for proofreading
and suggestions.
Signed-off-by: NAlex Riesen <raa.lkml@gmail.com>
Signed-off-by: NShawn O. Pearce <spearce@spearce.org>