Fixed Issue #71 self blocking

Added a method for checking if a TwitterStatus belongs to the current user or not.

When a User does an action( block or report as spam) to a group of tweets where his own tweet is one of
them, I apply the action to all of them except his own tweet.

Note: @Fammy has told me to base my future pull requests on the develop branch so I hopefully I made that right and I don't mess up something.