Add support for JDK 11 LTS

[deinhofer]

Oracle has changed release cycles according to other vendors having short term releases and LTS. JDK 11 is the new LTS version.

According to the release notes some things have been removed which could have an impact on Asterics.

• Removal of JavaFX (including javafx packaging): JavaFX packaging is used by APE to create customized installer for an AT solution. JavaFX is still maintained as open source library and can optionally be added again: https://openjfx.io/. jlink also looks interesting, maybe this can be used instead. Here is the white paper of Oracle about it.
• Removal of deprecated APIs and Classes
• Removal of 32bit support: So some plugins will be not usable any more

[deinhofer]

There is a branch for JDK 11 support, which already provides a runnable version with some restrictions: https://github.com/asterics/AsTeRICS/tree/fixes4java11