Fix MAGN-5376 Element.Geometry not working after reopening file.
Cherry-pick in core separation work
Set all projects to .NET 4.0
ShouldDisplayPreviewCore is a property, not a method
Revert changs in CS.props file
Fix changes to RevitNodesUI.csproj
Remove .NET 4.5 framework version prop from test csproj files
Merge pull request #50 from pboyer/DynamoCoreSplitRevit2014

Dynamo core split : Revit 2014
Updated RaaS dll's for NodeCustomization changes
Merge pull request #52 from pboyer/DynamoCoreSplitRevit2014

Updated RaaS dll's for NodeCustomization changes
Hanlding exceptions when constructing elements
Move one test case out of the Failure category
Add a test case for MAGN-5160
Add a test case for MAGN-3711
Check the floor type as well
Merge pull request #47 from Randy-Ma/magn-5376

Fix MAGN-5376 Element.Geometry not working after reopening file.
Merge pull request #49 from Randy-Ma/magn-5160

Handling exceptions when constructing elements
Merge pull request #55 from Randy-Ma/add_a_test_case

Add a test case