Windows build bundles jre

Installer goes to 64 bit program files folder too.
Merge pull request #37 from dreisch/winbuild_bundle

Windows build bundles jre
Plugin folder location

Can't use installation directory: e.g. in windows it would require
running Korsakow as admin.

Use APPData on windows, Application Support on OSX and ~/.korsakow
otherwise.
64-bit build support
Bundle JRE on windows build.
OSX ant build more multiuser friendly.

Signing is optional, requiring an ENV var to perform.
Split launch target into "Build" and "Publish".
Multiuser build path

Eclipse build path references an execution environment instead of a
user-specific JRE
Ant uses JAVA_HOME

Cleaned up launch configs