Local keyword semantics

1. Semantic implementation of local variables
2. Testcases for local
Fix scoping in functions

1. Fix variable scoping in member functions
2. Added testcases for local vars in member functions
3. Added negative testcases for local keyword
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into localkw_semantics
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into localkw_semantics
Added associative update tests for local vars

1. Added associative update tests for local vars
2. Move imperative tests from assoc microfeature ->imperative
microfeature
Fix testcase syntax error
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into localkw_semantics
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into localkw_semantics
Revert change to testing file
Check for global var values
Merge pull request #1956 from junmendoza/localkw_semantics

Local keyword semantics