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.
Prototype core modifications to support vector chart objects delivery to
plugins