Fix ast generation issue for CBN; code clean up
Fix copy/paste issue for operator functions
Refactor AstBuilder to move node manager to SyncDataManager class
Merge fix
Fix build caused by merge
Add unit tests for DSLibraryServices
Add basic unit tests for DS function node evaluation
Add test cases for DS function node
Modify for code review
Remove full path in dyn file for math.dll
Merge pull request #612 from ke-yu/ChocoButter

Fix ast generation issue for CBN; code clean up