Changed build system from SCons to ant.

SCons just doesn't seem suited to more involved java builds. Maybe it's
just me, but ant makes things a hell of a lot easier and cleaner. The
docs show up as changed because I regenerated them with the new 'ant
docs' target.
Added junit testing framework. Closes #12.

The ant buildfile now supports junit unit tests, and I put in a couple
tests for HTTPRequest.
Merge branch 'unit-tests'

Conflicts:
	README.md
	build.xml