Summarize API differences between revisions of Cabal packages.

Precis library is BSD3, Precis executable is LGPL apropos the dependency on CppHs.

NOTE for version 0.5.0 - the next version is likely to have substantial changes. Version 0.5.0 does have a better strategy to resolve conditional modules, but otherwise it is not a compelling upgrade. If you have 0.4.0 installed, I recommend you skip this revision and wait for the next version.

CHANGES 0.4.0 to 0.5.0

Major re-organization. Module-to-file resolution substantially changed. Should be better for Cabal fines that use condition variables.

3.1 to 0.4.0