Fix java checker crash, some memory leaks
Fix many memory leaks.
Add a few default java paths on linux
Fix FTB-related issues
Fix for invalid prelaunch commands
Fix library replace issue
Deny april fools outside of first april.
Do not spam logs too much, bump version and add to changelog.
Merge remote-tracking branch 'origin/develop' into feature_cmake_stuff

Conflicts:
	CMakeLists.txt