Assign the expression id of the node before SSA transformation

This information is required by the delta execution when marking
previous graphnodes inactive but is unused by the compiler and runtime
Merge pull request #109 from junmendoza/StableBranch_StackOverflowFix

Assign the expression id of the node before SSA transformation
Merge remote-tracking branch 'upstream/StableBranchWithTestcases' into LocalStable
Add a 2 argument function def and call AST testcase
Merge pull request #110 from junmendoza/StableBranch_StackOverflowFix

Add a 2 argument function def and call AST testcase
Merge remote-tracking branch 'upstream/StableBranchWithTestcases' into LocalStable
Refactoring of parse function