Formatting fixes.

1. markdown CSS class added to div.content.
2. get_summary fixed. Now it takes only first sentence from method's
docstring, same as it was for the class.
Template substitution possibility added
Merge pull request #138 from dmitry-krasilnikov/master

Formatting fixes
Merge pull request #143 from ariovistus/master

suppress those obnoxious colons
some initial readthedocs docs

use selenium to get screenshots for the bling
strip markdown from operation summary
parameters' minimum and maximum are strings