Update for unity 4.6b20

I made a few changes to make UnityConsole compatible with Unity 4.6 beta 20.  

Just a few small changes, please have a look -- I also updated the unitypackage too.

PS: the indentation on the diff looks really bad on github for some reason, but the actual file is clean.  If you know how I can fix that or if there's anything else I need to change, let me know.