first version of script updating tilesets background
added simple counting down to terminate the process
CR change: updated DDL for tile_set table
CR change: got rid of some unnecessary stuff
added counting down to terminate the process when errors occured
refactoring: because of strange results cause possibly by race condition made the script work in sequential way
added a workaround and more logging when a file cannot be fetched
refactored script so it query for only one template
added tiles' set id to the output
Merge pull request #195 from Wikia/MOB-869

MWEB-869