Merge pull request #13 from adamwy/master

FORGE-1835: BootstrapClassLoader should use temporary dir to unpack furn...
Java 7 syntax
FORGE-1276: Prevent JDK from leaking ClassLoaders from java.util.logging.Level unless 'furnace.logging.leak' is enabled.
[maven-release-plugin] prepare release 2.6.0.Final
[maven-release-plugin] prepare for next development iteration