- `./htdocs/*` duplicates the content of `pythonnet.github.io`
- `./installer/*` isn't used for distribution anymore
- `pythonnet.build` is no longer used as build method.
- `*.{mds,,mdp}` are deprecated mono files. Deprecated since eff40df
- `pythonnet_8.sln` old solution file
- `pythonnet_9.sln` old solution file
- `doc/mono_config.txt` outdate version of `.\Python.Runtime.dll.config`
- `doc/Python.Runtime.dll.config` outdate version of `.\Python.Runtime.dll.config`
- `visualstate` is a per user setting. https://groups.google.com/forum/#!topic/nunit-discuss/7aXg_usr98Q

Relevant items from todo.txt were opened as tickets

`sourceforge-logo.png` not sure why it existed
`clrmodule.pp.il` used to be part of the makefile build to create `clrmodule.il`. No longer used.
`oldmodule.il` is an old copy of `clrmodule.il` commit: 927bbf1

- Add reference to py3.3 and py3.6 interop files
- Add missing preprocessor to py3.3 interop
- Remove unused build script. Unref on commit: 5300343

Note, looks like nothing uses `clrmodule.il` anymore. Leaving it for now.

- Remove py32 classifier
- Stop testing on unsupported python versions
- Add python33 testing
- Changed check_output to _check_output

> warning : The project configuration for project 'clrmodule' corresponding to the solution configuration 'ReleaseMono|x64' was not found.