Log message:
py-typed-ast: fix building conflicts; require Python 3.3+; switch to PyPi

Log message:
devel/py-typed-ast: Import version 1.1.0

typed_ast is a Python 3 package that provides a Python 2.7 and Python
3 parser similar to the standard ast library. Unlike ast, the parsers
in typed_ast include PEP 484 type comments and are independent of the
version of Python under which they are run. The typed_ast parsers
produce the standard Python AST (plus type comments), and are both
fast and correct, as they are based on the CPython 2.7 and 3.6
parsers.