New build system
- Translation updates, added Brazilian Portuguese
- Small bugfixes
- Mac vendor updates
- JDK 11 support in Windows exe
- Linux version will now use GTK 3 by default, enabling touch screen support
- New build system using gradle and proguard
- This is the last release to support running under Java 7
Note: 3.5.4 was a broken release, replaced by 3.5.5