Merge pull request #3136 from Conceptual-Design/DynamoRevit2015

merge DynamoRevit2014 to DynamoRevit2015
added 2 files for Revit 2015, change version number
Merge pull request #3143 from theanh0512/changeVersionNumber

added 2 files for Revit 2015, change version number
Removed Legacy's files that are related to DynamoCore
Merge pull request #3145 from theanh0512/RemoveLegacyFiles

Removed Legacy's files that are related to DynamoCore