Bump the buckversion again.
Migrate some js_fragment targets from CrazyFun to Buck.
Build Selenium RC java client with Buck.
Adding java source roots to .buckconfig
Minor decomplexification of the selenium emulation build scripts.

Notably, this change pulls the generated JS files into the
com.thoughtworks.selenium.webdriven package rather than sub-packages.
Another buck version bump
Build most of the webdriver-backed selenium using Buck.

Still got to the WebDriverBackedSelenium class itself, but the meat now compiles
nicely with Buck. Timings of clean builds on my machine:

CrazyFun: 2m50s
Buck:     1m29s
Having a crack at fixing the build.