PLA-1549

Wrap global state and end the misery (pun intended) of categorymembers
core api.
PLA-1549 Address CR remarks
PLA-1549 Bumping cache version
(CE-1024) Load MediaWiki:Geshi.css on Lua Module pages
Merge pull request #4579 from Wikia/CE-1024

(CE-1024) Load MediaWiki:Geshi.css on Lua Module pages
Merge pull request #4568 from Wikia/PLA-1549

PLA-1549
Fix php strict standard notice
This is a problem with PHP because it sees the output of the SpecialPageFactory::resolveAlias() as a value
and therefore complains when the value is directly passed to array_shift as a reference.
The intermediate variable fixes this.
Merge pull request #4588 from Wikia/MAIN-2791

Fix php strict standard notice
PLATFORM-313 Make rebuildLocalisationCache.php use proper exit codes.
Merge pull request #4591 from Wikia/PLATFORM-313

PLATFORM-313 Make rebuildLocalisationCache.php use proper exit codes