new app LocalSettings.php
remove some environment checking helper functions
change strings to constants
switch chat env back to prod
remove getEnvironment helper function and use global env var
hide hiddenStructure
PLA-1607 Handle demo-hosts properly
Merge pull request #3942 from Wikia/PLA-1607

PLA-1607 Handle demo-hosts properly
Merge pull request #3936 from Wikia/MOB-1684-hiddenStructure

hide hiddenStructure
Merge branch 'dev' into PLATFORM-254

Fixed Conflicts:
	extensions/wikia/Bucky/Bucky.class.php
Merge pull request #3890 from Wikia/PLATFORM-254

Platform 254
ADEN-1237 Pass ad type to success and hop track events