Package metadata

[skvark]

The package should contain some metadata. There are some things to consider:

• authors/maintainers
  • probably only maintainers, since we are not the authors of OpenCV
• license must be probably the same as in OpenCV
• Readme in rst format, there's probably some conversion tool which can be run in setup.py

[skvark]

Licensing information has been now updated: 9f4dcc2

The README file can be converted with pypandoc tool. This is now listed in requirements.txt but Linux builds may need to install pandoc separately to be able to use it.

[skvark]

Setup.py contains now necessary metadata and uses pypandoc for README conversion if possible.

[skvark]

It seems that pandoc installation gets too complicated so I just converted the README into rst format. It can be converted back to markdown when PyPI gets markdown support (pypa/packaging-problems#46).