Doc and Grammar Utils - Initial Setup

I added "doc" folder and config.py to create auto docstring with sphinx style using readthedocs.org.
This is just initial setup for document. We need to add rst files (REsT) inside doc folder and then need to mention those filename.rst  name inside index.rst file. Hope you can understand the REsT type and sphinx document setup.
Feel free to modify the copyright authors name in config.py file which will reflect in documentation page http://open-tamil.readthedocs.org/en/latest/ , in this link user can download the documentation as LaTex pdf by click V:latest option at the right bottom of the page.

"utils" folder contains few initial setup files for Tamil grammar checkup/corrector. It takes time to complete it.
Meanwhile you may add documentation rest files in doc folder to enable autodocstings generator.

Thanks.