Brewtarget 2.3.1 release

Brewtarget 2.3.0 release

Version 2.2.0

Version 2.1.0

2.0.3 release

2.0.2 release

Changed version strings to 2.0.1

Old bug came back to bite us in the ass: slots/signals in RecipeExtra…

…sWidget causing infinite recursion.

Fixes issue where an absolute EXEC_PREFIX is treated wrong.