Fix bad interaction between combiner and empty lists parameter

Previous code might result in AugAssign on an empty ist, which is
undefined in pythonic.
Correct a typo in setup.py in test output

Missing a whitespace after a coma.
Merge pull request #64 from Midhrin/master

Correct typo
Comment openmp AST nodes, add to test_doc.py
Merge pull request #65 from joker-eph/comments

Comment openmp AST nodes and pep8 compliance
Make doctest integration in unittest generic.

Rely on introspection rather than redundant typing.
Improve type inference in presence of aliasing
Add a developer tutorial

- doctest integration
- integrated in website generation
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