To support event streams using 'mine'

Tested out * and it seems to be a command on MS-DOS which didn't allow it to be read. 

When i used * as the eventName, `spark subscribe *`, the eventName was read as `undefined`.

So i would be proposing `spark subscribe # mine` for event streams of the user.
Merge pull request #27 from kennethlimcp/patch-8

To support event streams using 'mine'