New and updated translations

Adding new translation files (thanks to all [contributors] (https://github.com/projectfork/Projectfork/wiki/Translation-Teams)):
* Norwegian
* Portuguese (Brazil)
* Swedish

Adding langs to .xml files

Update existing languages with latest translations from tx
Update .tx/config and gitignore (prevent to push untranslated langs to dev branch)
Update minor spelling in source en-GB file com_projectfork/admin/language/en-GB/en-GB.com_projectfork.ini