Added get_languages(), detect_language() functions and test cases for th...

*Added the get_languages() function to get a Python list of the supported language locale codes.
*Added detect_language() function to detect the language of the input text.
*Added test cases for both functions - Test cases pass with no failures.
I couldn't do anything about this because of the 80 column rule by pep8.

I hope the new standard is satisfactory.