Refactoring of checkStatus, checkNotStatus functions.
sorting added to getFiles() method
Merge pull request #42 from pisaychuk/master

sorting added to getFiles() method
Merge pull request #38 from raghavgautam/master

Refactored check(Not)Status to checkFeed(Not)Status and checkProcess(Not)Status
PrismConcurrentRequest DELETE_URL fixed
Expected message fix in PrismFeedDeleteTest