Release 1.4.2
Properly handle exceptions in the init task.

- exceptions are now get caught and `null` is returned as configuration
- launcher's start method checks for null before displaying the main stage
Merge pull request #283 from skaldarnar/startup_fixes

Properly handle exceptions in the init task.
potential fix for javaws using wrong version (branch 2.0)
Merge pull request #284 from skaldarnar/javaws_branch_fix

potential fix for javaws using wrong version (branch 2.0)
added missing labels (en)
(cherry picked from commit 281cd75)
Some CheckStyle and JavaFX fixes:

- passing stages to the controller classes (and init task)
- file and directory chooser dialogs can now be opened with an appropriate owner window (modal dialog)
- some checkstyle fixes (mostly javadoc)
Added the parent stage to the controller's `initialize()` methods
Merge pull request #285 from skaldarnar/quick_fixes

Some CheckStyle and JavaFX fixes:
Storing launcher settings on exit.
Fixed heap size boxes and their dependency.

Fixes #287
Modified the CSS styles to better work with Java 8.

Fixes #278
Removed duplicate copyright headers from CSS files.
removed another usage of `-fx-background-insets`.
removed rounded corners from content area
Merge pull request #288 from skaldarnar/heap_settings_bug

Heap settings bug
Integrate changes from the 1.4.2 release
Merge tag 'v1.4.2' into develop

Conflicts:
	version.txt
Removed obsolete ImageUtils class.
Updated GameJob.
- don't show TerasologyLegacy by default anymore (only installed versions)
- updated minimal versions w.r.t. to the latest changes + server crash