DAR-2525 Adding wgEnableUploads check to Promote Maintenance Scripts
DAR-2525 JSHint changes
DAR-2525 Added uploads disabled message on add photo button click
DAR-2525 Handling wgEnableUploads = false in asynchronous requests
DAR-2525 Fix typo
DAR-2525 Translation fix
DAR-2525 JSHint changes
DAR-2525 Removing console.log
DAR-2525 CR changes
DAR-2525 fixing bug introduced with too much JSHinting

Plus, additional, nicer errors
DAR-2525 Removing unnecessary variables
DAR-2525 Handle exception differently
Merge pull request #1833 from Wikia/DAR-2525

DAR-2525 Adding support for wgEnableUploads=false to Special:Promote