+ added a simple context NSDictionary variable to the MJAutoCompleteManager.
+ added a simple context NSDictionary variable to the MJAutoCompleteManager.

This can be used to, for example, make the owner of the component set the context to something, and the datasource of the component reads the context and does some control flow based on that.

Mazyod/MJAutoComplete,deepakiosdev/CommentViewWithHashTag