added node for e
renamed dynEquation.cs to dynFormula.cs
added pi to formula node built-in values
Added booleans  to curve samples
Fix crash with tab selecting on note.
Cleaning up some search terms
Merge branch 'master' into UI_refactor
Move search intialization stuff into the view constructor.
Rename DynamoElement to DynamoCore. Make a new Dynamo.Models namespace.
More cleanup of Dynamo.Models workspace.
Refactor view models into a namespace, and move the watch contents out to the top level of nodes.
Add a mono project to build DynamoCore and remove some dead using statements.
Move presentation of save confirmation to ui layer.
Move presentation of error messages to ui layer for package manager publish.
Use the URL decoder in RestSharp instead of System.web.
Make the dynamo core mono project build an assembly.
Add a sandbox project for the dynamo core mono.
Delete duplicative double click event call.
Move the workspace collection back into the view model.
Cleanup hack to move workspace collection into view.