Make button content use binding to selected element(s).
Merge branch 'ChocoButter-2Become1' of github.com:DynamoDS/Dynamo into ChocoButter-2Become1
Removed unwanted build artifacts (*.pch, *.tlog, etc)
Merge branch 'ChocoButter-2Become1' of github.com:DynamoDS/Dynamo into ChocoButter-2Become1
Included "DesignScriptStudio.Renderer" as part of Dynamo solution
Merge branch 'ChocoButter-2Become1' into CrossFade
Add test helper function DSEvaluationTests.SelectivelyAssertValues()
Update some test function names
Defined "USE_DSENGINE" preprocessor for "DynamoCoreUITests.csproj"
Merge pull request #1108 from ke-yu/ChocoButter-2Become1

Add helper function to test suite to selectively verify some values in a collection
Merge branch 'ChocoButter-2Become1' of https://github.com/DynamoDS/Dynamo into ChocoButter-2Become1
Merge branch 'ChocoButter-2Become1' into CrossFade
Merge branch 'CrossFade' of https://github.com/Benglin/Dynamo into CrossFade
Modified one-to-many migration functions

Helper nodes are created only when the input port of the old node is
occupied