Additional Portuguese locale data

This commit:
- Removes the country designation (brazil) from the filenames until LMMS properly supports this designation.  
- Adds more comprehensive translation over the previous commit
- Includes the compiled "QM" format

**Note:** These files will take over as the new Portuguese defaults.  Tested on Ubuntu 12.04 x64 using `LANG=pt lmms`, screenshot here:  https://cloud.githubusercontent.com/assets/6345473/2688614/30630b04-c2b5-11e3-9dd0-2176dd2538e4.png

For questions specific to the accuracy of translated items, please contact the author, emviveros;gmail;com.