add back missing pcbnew cross probing event handlers.  eeschema launches kiface versions of pcbnew & cvpcb if not single.

    Eeschema, Pcbnew, and Cvpcb all run under the same process now,
    FOR THE VERY FIRST TIME!

*)  Added KIWAY::PlayerCreate(), PlayerClose(), and PlayersClose().

*)  Factored FRAME_T into <frame_type.h> from ID_DRAWFRAME_TYPE.

*)  Found that the following command line is helpful for collecting all the *.kiface
    files into the <build>/kicad/ directory so that kicad can find them.

      $ cp `find . -name '*.kiface'` kicad/

    Maybe somebody will want to rework how the CMake files are organized so all
    the binaries can go into the same place.  See python-a-mingw-us.

*)  This might fix the problem on the Mac where child process windows were not
    coming to the front.  See ->Raise() in kicad/mainframe.cpp.

*)  You can set USE_KIFACE to 0 in kicad/mainframe.cpp to chain load child exes
    instead of using the KIFACE modules directly, i.e. revert.

    if it is running under single_top.cpp or under a project manager.

*)  Test Kiface().IsSingle() when adding menus, some operations are not permitted
    when running under a project manager and the KIWAY_PLAYER is pegged to a
    specific project.

*)  Implemented KIWAY::KiFACE() so it loads *.kiface files.  They still have to be
    in the same directory as the main *.exe launcher, so this presents some difficulty
    when the binaries are not yet installed but rather the *.kiface files are still
    in their original build directories.  For today, I simply copied _pcbnew.kiface
    to build/kicad/.

*)  Add a test case to kicad/mainframe.cpp just to get an early peek at loading
    _pcbnew.kiface under the C++ project manager.  Got that working for one
    specific invocation just for proof of concept.  Surprise, it works.

not know where the template directory was.

- Set the modified flag even for null segment removal

remove a static wxString constructor which was out of sequence with another dependent one, at least with one toolchain.

was used locally.  Then comment it out in favor of a newer strategy for
filling in nicknames in cvpcb. 

Add MODULE* FootprintLoadWithOptionalNickname( const FPID& aFootprintId )
        throw( IO_ERROR, PARSE_ERROR );
from code found elsewhere.

Cmakefiles: do not create map files on Windows, because creating map file generates hundred of useless warnings.
In PATCH_COMMAND, use patch instead of bzr patch if patch or patch.exe is found (mandatory to build Kicad on msys2 because 'bzr patch' does not work when using msys2)

Cmakefiles: do not create map file on Windows, because creating map file generates hundred of useless wranings.
In PATCH_COMMAND, use patch instead of bzr patch if patch or patch.exe is found (mandatory to use msys2 because bzr patch does not work when using msys2)

Pcbnew: bug fix: sometimes (depending on a previous command) pcbnew could  create an usual zone instead of a keepout zone when the" create keepout zone" tool is activated

Very minor other fix

Eeschema: fix Bug #1298868 (Can't create new schematic from main toolbar icon) - Fix a bug I created in rev 4773