Wheelr

- The default logger will no longer override the user's logger when importing wagon.
- Module -> Package (everywhere). Most importantly, the metadata now include `package_name` and `package_version` instead of `module_name` and `module_version` (what the hell was I thinking?).

- Added support for excluding specific modules via the --exclude (-x) flag which can be supplied multiple times. This will be reflected in the metadata.
- Added `wagon showmeta -s SOURCE_ARCHIVE` which prints out the metadata of a wagon archive.
- os properties in the metadata are now null when all either creating an archive on OS X or Windows or if the platform is `any`.
- Archive name now contains the distro and release if creating an archive on Linux which contains non-Pure-Python wheels; but, when irrelevant, archive name will be somewhat like this: `cloudify_fabric_plugin-1.2.1-py27-none-any-none-none.tar.gz`

- Added support for user supplied Python versions.
- Added support for an `--ignore-platform` flag when installing a module.
- Archive name now includes distro and release for Linux compiled archives so that they're identifiable.
- Much more documentation

Moved from Wheelr to Wagon and added creation and installation validation.