Fix #18: Bug in fetching cases from Codechef

Add support for python3 and macOS

Add support for more languages, set compiler flags

- Add support for Ruby and Haskell
- Set compiler flags as done by online judges
- Fix error code for TLE

Add support for Java

Add feature clear cache for a given site

Update GIF

bug fix - added base class function for run

Upgrade version to 1.0.1

Add README.rst and MANIFEST.in for PyPI