get_letter_type() made PEP8 and Google Style guide compliant
is_aytham() and is_vowel() are not PEP8 and Google style guide compliant
Made rest of file PEP8-compliant, and made docstring for is_consonant()
Google Style guide-compliant
Made is_combination() docstring Google Python style guide-compliant
Made docstring for is_kuril() Google Python styleguide-compliant
Made is_nedil() Google Python Styleguide-compliant
Made get_vowel_type() method Google Python style guide-compliant
Merge pull request #6 from abmohan/master

More PEP8 and Google Python Style Guide compliancy changes