Release v3.4.0 on Maven Central

[tofi86]

@slajar @tobium I did a couple of fixes and refactoring this weekend. This is the changelog:

• Massive code refactoring
  • code formatting
  • specify maven source encoding
  • fix Ant build files
  • run examples with a modern JavaApplicationStub (universalJavaApplicationStub)
• Bugfix: JarBundler on Windows created a classpath with backward slashes which broke the Info.plist file on macOS
  • \ in classpath are now replaced with /
• Remove support for Java 1.3
  • if no jvmversion attribute is set, the default version is now 1.4+
  • removed deprecated growboxintrudes attribute
  • removed deprecated liveresize attribute
  • removed deprecated smalltabs attribute
• Updated HelloWorld example to show JVM details, classpath and mainArgs
• Support for Java 9+ in jvmversion attribute

Additionally we already had these improvements on master since 3.3.0 release:

• Updates to docs and examples
• Optional supportsAutomaticGraphicsSwitching attribute which defaults to true (for Plist key NSSupportsAutomaticGraphicsSwitching)
  • PullRequest !14, thanks to Björn Kautler (@Vampire) for his contribution!
• Update Ant from 1.9.3 to 1.9.14

I tested with Maven and Ant and it seems stable :-)

May I suggest to release version 3.4.0 on Maven central? You still need to update the SNAPSHOT version and Readme Changelog once you're ready, but everything else should be good to go.