Added Wiki pages. Updated README with links to newly created wiki pages.

1. Added [Wiki pages](https://github.com/BinPy/BinPy/wiki).

    Check [this](https://github.com/BinPy/BinPy/wiki/_pages) for a complete list of all the newly created wiki pages [ Some are incomplete ].

    Please edit incomplete / incorrect entries in those newly created wiki pages.

2. Updated README.md with wiki links.