enhanced smooth movement, improved logic, and added arbitrary rotations
In CMake, allow $PREFIX command line override.
Merge pull request #113 from seandepagnier/optimum-merging

enhanced smooth movement, improved logic, and added arbitrary rotations
Merge branch 'master' of github.com:OpenCPN/OpenCPN
3.3.1712
Revert "Fix the focus after toolbar is shown on some Linux platforms" as
it broke the behavior on KDE, something smarter will be needed...

This reverts commit 87f797226b33b70e2579bf0c94a694ea182abe28.