Updated and revised all pt-br translation lines.
Russian language and translation keys
Selectbox retina display issue
Selectbox retina display issue
Add new lines from editor settings and was corrected a little lines in the validation.php language
backend.access_dashboard no longer makes the System menu visible.
Merge pull request #281 from octodevel/master

Updated pt-br language
Merge pull request #283 from mrmlnc/master

Russian language and translation keys
Merge pull request #285 from chesterx/master

Selectboxes Retina display issues fixed.
Merge pull request #296 from BrainCoder/fix_issue_295

a small fix for issue #295/#218
May aswell use the default encryption key since config isn't updated
Simplelist control now supports scrollbars and selectable lists
Merge branch 'develop' of github.com:octobercms/october into develop