Serialize Core + Test Cases for :
Node Model, Variable Input, Sublists, Double, DoubleInput, DoubleSliderInput,
Bool, String, StringFilename and Formula

Also a small change to recored addition/removal of ports for InputVariable Nodes
Remove legacy debugging code from IronPython code completion code
Merge branch 'master' of https://github.com/ikeough/Dynamo
Fix attribute error that was breaking the build
Add to logging for VisualizationManager.
Merge branch 'master' of github.com:ikeough/Dynamo
Added previous value for constant nodes
Set the asm lists back to threadsafe for now.
Avoid crash of visualization manager when selecting non-node object.
Particle systems drawing again. Slowly.
Add a little throttling to visualization of Relaxation.
Resolved cherry-pick conflicts
Merge changes
Merge pull request #526 from ambarish-prakash/SerializeforNonRevitNodes

Serialize Core - Basic Nodes
Updates to LibG libraries to support more point and vector operations.
Merge branch 'master' of github.com:ikeough/Dynamo
Assert volume and area match with a delta.