Add all builtins modules in globals analysis
Correctly add itertools import in genExp pass
Fix argument parameters

Arguments parameters are ast.Name with ast.Param context instead of
ast.Load context in function create for generator expressions
Add use def chain analysis.

Returned result is a dict containing graph for each variable
Add OpenMP detection analysis
Add false polymorphism pass
Fix passmanager to correctly handle FunctionAnalysis
Define some missing len intrinsics
Fix openmp test
Update todo list
Add openMP missing statements
Merge pull request #69 from pbrunet/use_def

Use def