add delete link to special:listfiles entries
fix link, change to delete link to lowercase
some changes per code review
Xml -> Linker
Rename existing traits to follow *Trait convetion.

I renamed the existing traits in includes/wikia/traits to be named
*Trait and to take the .trait. out of the pathname. This should make
them compatible with PSR* autoloaders as well.

/cc @nmonterroso
PLAT-373 short circuit addition article lookups

Only traverse an article for images once to prevent an infinite cycle
between getImages and the fallbackOnNoResults hook.
MAIN-2657 PHP Fatal in AdEngine2Service.class.php
Merge pull request #4324 from Wikia/cherry-pick-the-main-2657

MAIN-2657 PHP Fatal in AdEngine2Service.class.php
MAIN-2657 PHP Fatal in AdEngine2Service.class.php
Merge pull request #4325 from Wikia/cherry-pick-the-main-2657

MAIN-2657 PHP Fatal in AdEngine2Service.class.php
NearbyPOI search service 1st draft
(CE-977) Apply MW 1.19.18 security release
Merge branch 'CE-977' into dev
VID-1875 normalizing lazy loading between video and image rendering so they both work the same
VID-1875 cleaning up implementation
Merge pull request #4332 from Wikia/VID-1875-cherry-pick

Vid 1875 cherry pick
fix randomwiki fatal error and optimize caching
Merge pull request #4314 from Wikia/plat-373-image-serving-hook-loop

PLAT-373 short circuit addition article lookups
Merge pull request #4219 from Wikia/rename-traits

Rename existing traits to follow *Trait convention.
Address CR and add response object cleanup