Updated mediawiki/extensions
Project: mediawiki/extensions/BetaFeatures  baf5efad2305cc0f22cb77f1be7ecb1ca837edf5

Sanitized directory structure

This has been really bugging me. :)

Renamed/merged directories:
* js/ → resources/
* css/ → resources/
* img/form-icon/ → resources/images/

Updated paths where applicable.

Change-Id: I4bc552252b1ac8966d6d96f84e868dd8bc4609f4