Documentation for tutorials

[pmehta08]

Correction required in the documentation at https://moose.ncbs.res.in/readthedocs/user/py/tutorials/index_tut.html

Spelling error : The file name is repressillator.py and not repressilator.py
Extension missing : The filename should be findSteadyState.py instead of findSteadyState
Consistent filename : The filename for Slow Feedback Oscillator is listed as slowFbOsc.py, whereas in the moose-examples repository, it is KholodenkoOscTut.py

Note : Moose examples are in a different git repository and need to be cloned separately from moose-core.

https://github.com/BhallaLab/moose-core
https://github.com/BhallaLab/moose-examples