First release

I have added two releases. The first is Ryan's v0.2 code that is also available at the MSTParser web site:

http://www.seas.upenn.edu/~strctlrn/MSTParser/MSTParser.html

The second is v0.4, a release that I have modified in various ways, though nothing too drastic. The main difference is that the parser now supports the CoNLL format for dependencies, and it is much easier to add new features. There are also some handy Python scripts, like mst_experiment.py, which takes care of n-folding and such. See the Change Log for details.