Serbian Translation 1.1

updated text and change filename to sr_RS
delete sr_sr.pot sr_rs.mo
new sr_RS.pot and sr_RS.mo
Merge remote-tracking branch 'upstream/master'
reduce specificity in activation assets rewrites

Allows for easier customization of assets directory without needing to add new rewrite rules for each new directory.
Add translation to list
Merge pull request #824 from lautreamont3/master

Serbian Translation 1.1 (update)
persian language

persian language
Merge pull request #837 from zareh777/master

persian language
Merge pull request #827 from montchr/rewrites-assets

reduce specificity in activation assets rewrites
Allow nav depth override
Merge pull request #838 from Foxaii/nav-depth

Allow nav depth override
Updated pt_BR translation
Merge pull request #839 from weslly/master

Updated pt_BR translation
Update to latest Bootstrap 3 (RC2)
Update usage.md
Merge pull request #843 from davoudrafati/patch-1

Update usage.md
Merge branch 'master' of https://github.com/retlehs/roots into retlehs-master