first try at a skeleton script

Regarding the TODO: "Figure out a style for Sphinx-type
documentation", here are my thoughts:
    
    - As a general rule, I guess a comment block should always be
    associated with the next language element.
    
    - The script itslef should start with a block describing the
    overall purpose of the script and perhaps potential
    caveats/things to keep in mind etc.
    
    - Each indidivual doc section should start with a single short
    sentence summarizing the documented element, followed by further
    text going into more detail.
    
    - Generally, all doc text is formatted in reST. However, one
    thing I always hate when writing documentation strings is adding
    all kinds of markers for things like parameters, return values,
    etc. (e.g., "@param", or ":param:"). What I've played with for
    HILTI is reducing this stuff to a minimum and extracting it from
    the structure of the text. Example:
    
         # Function for checking That.