Started work on new JavaFX layout:
  * added new icons
  * view specifications with FXML (not final)
 Optimize adding new translations
 Fixes #215
Update CHANGELOG.md
Add jnlp file
Added webstart text and icons and signing
Updated webstart content
Changed update policy
Removed application plugin from gradle build
Removed launch4j config files
Removed SelfUpdater
Don't crash on missing i18n
Replace self-updater info text with changelog tab
Fixed icons folder and changelog display
Load "engineVersion" and log game version info
Fixes #208
Fix serialVersionUID
#208
Delete old/unused/outdated cache files
Fixes #200
Update logback and slf4j
Update launch4j 3.4

Fixes #142
Update CHANGELOG.md
Update copyright and license