Removing old, currently never used code
Obsolete comments
[#1490] Cleanup fo PSR(1/2) method naming.
Add annotations for ignoring rss_safe method name in CS checking.
Exception class for low level errors
Replace lowlevelError() calls with throwing exceptions
No global $app uses anymore, global functions can access $app via ResourceManager::getApp(). Early access attempt to $app throws LowlevelException
Merge branch 'master-org' into code-cleanup
Additional fix for #1575. Show info popup on markdown fields.
Merge pull request #1582 from rixbeck/code-cleanup

No global $app uses anymore
Two small amendments to #1582: replacing bit of deprecated code, fixing typo.

Pinging @rixbeck :-)
Fix for non-clickable sidebar links.
Merge pull request #1580 from jkazimir/master

[#1490] Cleanup fo PSR(1/2) method naming.