Catch exception in building ast and set node's state
Add branch for node state AstBuildBroken
Add error message
Add builtin method %nodeAstFailed()
Refer to %nodeAstFailed() builtin method
Add brushes for ast build broken state
Display warning message in tooltip
Add DynamoDummyNodes project for UI node testing
Merge master and fix conflicts
Fix typo
Add ast build exception handling from AstBuilder to BuildAst()
Fix typo
Update DynamoDummyNodes project information
Add test case AstBuildFailTest
Add comments
Merge branch 'master' into fix_magn2580
Merge branch 'master' into fix_magn2580
Also verify the warning message of node
Update ast broken error message
Remove refactorings in BuiltInMethods.cs