Merge pull request #2 from poifox/master

Backend update
French new strings
Merge pull request #26 from ttomek32/master

Update
Merge pull request #27 from PtiLuky/master

New french strings
update new lines german
df
small fix
Add Portuquese translation

Complete translation for portuguese Brazil, revised one time...
Was sent model_validation wrong file

sending right portuguese model_validation file
Merge pull request #28 from cerfribar/master

Updated Translation German
Merge pull request #29 from giulianazf/master

Portuguese translation
Translated recent changes for Serbian
Translated recent changes for Serbian
Merge pull request #31 from vido89/master

Translation for Serbian
Update README.md

Translators should always do a merge to sync from the main to their fork, BEFORE opening a pull back request from their fork to the main.
Correction on "upload"
Corretions

Some corretions for portuguese
Merge pull request #32 from PtiLuky/master

Correction
Small fixes in translation
Merge pull request #33 from cerfribar/master

small fix on german translation