improve docs for fuzzywuzzy.process
improve docs for fuzzywuzzy.process

The documentation for this module was dated and sometimes inaccurate.
This overhauls the docs to accurately describe the current module,
including detailing optional arguments that were not previously
explained - e.g., limit argument to extract().

This change follows the Google Python Style Guide, which may be found
at:

<https://google-styleguide.googlecode.com/svn/trunk/pyguide.html?showone=Comments#Comments>

aeeilllmrx/fuzzywuzzy,beni55/fuzzywuzzy,aeeilllmrx/fuzzywuzzy,zhahaoyu/fuzzywuzzy,shalecraig/fuzzywuzzy,salilnavgire/fuzzywuzzy,jayhetee/fuzzywuzzy,medecau/fuzzywuzzy,salilnavgire/fuzzywuzzy,shalecraig/fuzzywuzzy,blakejennings/fuzzywuzzy,pombredanne/fuzzywuzzy,pombredanne/fuzzywuzzy,blakejennings/fuzzywuzzy,beni55/fuzzywuzzy,zhahaoyu/fuzzywuzzy,jayhetee/fuzzywuzzy