pycc writes header files using text mode. fixes #209
Merge pull request #210 from hgrecco/master

pycc writes header files using text mode. fixes #209
Update gitignore and setup sdist
Merge branch 'master' into devel
Add MANIFEST.in again and update setup.py for asdl test schema
Change cwd for asdl package building in test
Use tuple for exclude_packages
Make issue 204 py3 compatible
Reformatting and starting personal edits of intermediate representation documentation.
Modified normalized IR description to match Normalized.asdl in the numba/numba asdl branch.
Proposed adding let to normalized AST.  Started proposal for untyped IR.
Updates to normalized and untyped IR's based on jriehl's proposal.
Re-remove comprehensions from untyped IR.