Merge pull request #71 from xillibit/patch-9

Fix typo in language files and wrong usage double comas
Installer

- onChange db_driver need to verify connection again
- new Model Methods: canUpload, uploadLogo
- Fixed db_drive on install
Merge remote-tracking branch 'upstream/staging' into staging
Merge pull request #73 from juliopontes/staging

Installation Improvements
Typo in postgresql driver name in install part