CMake Nightly Date Stamp
FindSubversion: Use TortoiseSVN registry key to locate svn

If TortoiseSVN is not installed in the default path, the svn executable
installed by TortoiseSVN is not found.
Using the registry key should always find it.
Avoid certain actions on IMPORTED targets.

As we're iterating over IMPORTED targets now, handle them in
the loop body. The existing behavior is harmless because generally
nothing is done anyway for IMPORTED targets in these code paths,
because they do not have sources for example.
Merge topic 'minor-cleanup' into next

618e67b Avoid certain actions on IMPORTED targets.
62b9045 CMake Nightly Date Stamp
Merge topic 'FindSubversion-TortoiseSVN' into next

62c276f FindSubversion: Use TortoiseSVN registry key to locate svn