Removed xcuserdata
Fixed some typo in documentation
Renamed nested classes with BKT prefix
Added missing call to delegate in BKTTaskObserver
- Deleted bk_dispatch_sync because it used deprecated dispatch_get_current_queue function
- Replaced bk_dispatch_sync with dispatch_sync
Changed JSON parsing step to not parse input when it is a no data input
Added new kind of step to download data using NSURLSession
Project cleaning
Added helper methods to create tasks based on NSURLSession loading step
Added missing header import
Updated Readme for v0.9 release
Fixer typo in documentation
Updated pod spec for v0.9
Merge branch 'release/0.9'