Docstring for `pycht.py`

[tlentali]

In order to reach the highest pylint note, I added some doc-string in each beginning of each script.
But I didn't fill it correctly.

pycht/pycht/pycht.py

Lines 1 to 3 in 31e3e53

	"""
	Project settings
	"""

Should be :

`pycht.py` script contains a `pytch` class that call `ImageProcessing` and `Clustering` classes in order to run the whole code at once.

It should serve as a quick reference to all the functions and arguments.

Docstring format :

• what are the most common python docstring formats
• styleguide