Adding strong ref to handler block
Send notifications on the main thread. It is bad practice to send that kind of notifications on a background thread.
Merge pull request #6 from vincentjames501/dev

Adding strong ref to handler block
Merge pull request #7 from miklselsoe/master

Send notifications on the main thread.
Added podspec
Now using OS_OBJECT_USE_OBJC define to determine whether or not to call dispatch_release