Version 0.2 Reindeer

Features:

• added support for footnote-style images and links;
• added support for LaTeX renderer;
• renderer classes are now context managers (see README).

Development:

• added test suite for LaTeX renderer;
• added benchmarking script for performance comparison;
• added scripts to compare render output across commits;
• added CI testing for versions up to Python 3.3.

Fixed:

• a bunch of regex craziness;
• outdated documentation.