Merge pull request #12 from Silarn/master

3/14 Update
Merge pull request #13 from Silarn/master

3/15 Update
Can no longer add a In/Out if one for that value already exists.
Right-click can now remove connections/locks the same way Left-click creates them. Without dragging, removes both In/Out for current value.
The "Add" buttons increase available connection/lock values.
Some code to draw a box with mouse.
Comment update
Merge pull request #15 from theUPquark/master

Right-click delete and resulting lone nodes removed. Add buttons now add!