Noticed that the compatible methods are not correctly displayed when rendered on readthedocs:

Compatible with
------------------
* `morris`

Turns out Sphinx pre-defines section headers and does not render custom ones.
To resolve this, I've merged the listings under the "Notes" section.

I plan to place further text on method caveats, pitfalls, and other useful information (as done for the Saltelli method).

Notes
-----
Compatible with:
    `morris` : :func:`SALib.sample.morris.sample`

PR includes miscellaneous clean up (primarily removing whitespace, and other changes to conform to PEP8).