Refactoring of the Model View

[paulthatjazz]

We have a few performance issues that could be attributed to the model view.

I am proposing an eventual refactor of this section which will include:

• Updating to rete v2 or another more suitable visual programming library (Investigate viability of rete v2 and other libraries #238)
• More control over the model view via a stop button (Add a stop button to the Model View #365)
• If possible, implementation of multi-threading to reduce unresponsive "Frozen UI"
• If possible, more efficient methods of caching components that have previously been ran.
• Allow edges to be deleted if selected and user presses a delete button (Allow edges to be deleted if selected and user presses delete button #132)