Removed "ResqueScheduler::VERSION" reference as this constant no longer exists
Replaced missing "s_time" attribute with "at" to track the time a job was enqueued
Added s_time variable when enqueueing
Fixed indentation and reverted variable name from s_time to s_wait
Fixed: variable naming for arguments in enqueueDelayedItemsForTimestamp
Added s_time isset check for existing jobs
Added s_time isset check for existing jobs
Merge pull request #4 from michaelmessig/master

Fixed missing 's_time' index