MAGN_830
Merge remote-tracking branch 'upstream/StableBranchWithTestcases' into LocalStable
Fix AST nodes to code issues (MAGN-836, MAGN-839)
Merge pull request #128 from junmendoza/StableBranchWithTestcases

Resolve merge conflicts
Merge pull request #126 from ambarish-prakash/LocalStable

MAGN Issue 830 Fix
Merge pull request #127 from ke-yu/StableBranchWithTestcases

Fix AST nodes to code issues (MAGN-836, MAGN-839)
Merge pull request #129 from junmendoza/StableBranchWithTestcases

Fix build on DSS due to function name change in the GraphUtiltities
Merge pull request #130 from junmendoza/StableBranchWithTestcases

Ignore inactive graphnodes at compiletime
Merge pull request #131 from junmendoza/StableBranchWithTestcases

Handle deleted and modified nodes first before the added nodes
Implement ToString() and Equals() functions for AST nodes
Fix regression
Merge pull request #132 from ke-yu/StableBranchWithTestcases

Fix MAGN-865; Code clean up