l10n: vi: Update Vietnamese translation:

 * Update
 * review

Signed-off-by: Tran Ngoc Quan <vnwildman@gmail.com>
Merge branch 'master' of https://github.com/matrig/gitmagic
Merge branch 'master' of https://github.com/matrig/gitmagic
Merge branch 'master' of https://github.com/matrig/gitmagic
Brazilian Portuguese translation.

By José Inácio Serafini and Leonardo Siqueira Rodrigues.
created fork on github.com and added pl directory for polish translation
first quick and dirty translation from german translation using omegat
file basic.txt ready
file brunch.txt ready
file clone.txt ready
file drawbacks.txt ready
file grandmasters.txt ready
file history.txt translated partially
branch test created
prepared for make test
probleme
probleme
zwischendurch
clone.txt rechecked
drawback.txt rechecked