Enhanced HotSwapping

[Thomas Wuerthinger]

The source code for the HotSpot version that allows enhanced hotswapping 
(e.g., add and remove methods, fields, and super types) was just updated 
in the mlvm repository. There exists now also a light version of the 
modifications "hotswaplight.patch" that minimizes the difference to the 
current OpenJDK source code by omitting some of the more advanced 
features (e.g., method forwarding, calling deleted old methods, 
transformer methods). The enhanced VM passes all tests of Oracle's class 
redefinition test suite and comes with unit tests for the new features.

There are binary builds available from "http://ssw.jku.at/dcevm" for 
Mac, Linux, and Windows. So, feel free to install a VM with the new 
hotswapping capabilities on your machine and test them using your 
favorite Java IDE.

- thomas