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
Small Update to Tutorials
Updated Angle node description and search terms
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.
Search terms for hermite spline