Splitting groups in Editor, Part 1

Do not merge! Grabbing line draw code for next stage of update!
Merge pull request #7 from theUPquark/master

Some Line Renderer Stuff
In and Out Nodes (Complete)

Works in both the editor and the game. However, currently no way to set
connections and locks in the editor.

* Dropdown lists allow selection of active nodes in editor
* Selected node number is stored in a variable
Connections drawn automagically when you select a connection #

Commented out right click code for now
Fix old level loader detection code

Because I a stupid
Merge pull request #9 from Silarn/master

3/12 Update