start manual translation pt_BR

Sorted LINGUAS, started with pt_BR.po
Minor style fixes.
Merge pull request #224 from guitorri/manual-pt_BR

start  translation manual pt_BR
Run style beautifier

Cherry-pickers beware, you have to run it, too, at some point in time!
Fix crash when opening presets for j2k exports

This was due to a preset size that was bigger than needed. I hope I
didn't break anything. I didn't bump the module version since it should
be impossible that presets of this already exist ...
facebook: allow high quality (2048px) image uploads
(cherry picked from commit 68884da1e29054f9e2c1b4e3561fa05241841ed0)
Button to select between to split view or overlay
Create snapshots table and add a snapshot number column to images table
Several snapshots history and name saving

 + Write snapshot's history to xmp (TO BE FIXED)
 + Write snapshot's history to db
 + Write snapshot's name to db
TODO: we also need to read snapshots info from xmp file
Small modification in colums name in snapshots table