Uncompyle6

- Remaining Python 3.5 ops handled
(this also means more Python 3.6 ops are handled)
- Python 3.5 and 3.6 async and await handled
- Python 3.0 decompilation improved
- Python 3 annotations fixed
- Better control-flow detection
- Code cleanups and misc bug fixes

====================

- Better control-flow detection
- pseudo instruction `THEN` in 2.x
to disambiguate if from and
- fix bug in `--verify` option
- DRY (a little) control-flow detection
- fix syntax in tuples with one element
- if AST rule inheritance in Python 2.5
- `NAME_MODULE` removal for Python <= 2.4
- verify call fixes for Python <= 2.4
- more Python lint

====================

- Start to handle 3.5/3.6 build_map_unpack_with_call
- Some Python 3.6 bytecode to wordcode conversion fixes
- option -g: show start-end range when possible
- track print_docstring move to help (used in python 3.1)
- verify: allow `RETURN_VALUE` to match `RETURN_END_IF`
- some 3.2 compatibility
- Better Python 3 control flow detection by adding Pseudo `ELSE` opcodes

====================

- Correct MANIFEST.in
- More AST grammar checking
- `--linemapping` option or _linenumbers.line_number_mapping()_
Shows correspondence of lines between source
and decompiled source
- Some control flow adjustments in code for 2.x.
This is probably an improvement in 2.6 and before.
For 2.7 things are just shuffled around a little. Sigh.
Overall I think we are getting more precise in
or analysis even if it is not always reflected
in the results.
- better control flow debugging output
- Python 2 and 3 detect structure code is more similar
- Handle Docstrings with embedded triple quotes (""")

====================

- Fix Python 3 bugs:
* improper while 1 else
* docstring indent
* 3.3 default values in lambda expressions
* start 3.0 decompilation (needs newer `xdis`)
- Start grammar misparse checking

====================

- Handle Python 3.x function annotations
- track def keyword-parameter line-splitting in source code better
- bump min xdis version to mask previous xdis bug