bundle.
- Delete the old "FreeCol" executable
- Add the universalJavaApplicationStub (from
https://github.com/tofi86/universalJavaApplicationStub). MIT licensed.
With the jarbundler ANT task, allows Java applications to be started with
whatever JDK/JRE is available on the system. Apple's solution won't work
for Java 1.8 and above.
- Change build.xml to start up net.sf.freecol.FreeCol as the main class.
Added a property to the file so that the main class name stays consistent
between Mac app bundles and PC builds.