- Converted the Next/Prev C casts to static casts and removed the type
  unsafe ones
- Splitted as virtual the VIA::Flip member instead of using RTTI
- Heavily refactored the 'unconnected track' cleanup routine
- Misc constification

Plots function: fix a bug about virtual PLOTTER::Text, which was not virtual for derived classes due to a missing parameter in ::Text in these classes. Noticeable only in SVG plot.
SVG plot, fix a missing reinitialization in plot lines, which could define a filled polyline, instead of a simple polyline
(these fixes solve Bug #1313084 )

Reverse Marco's patch, pending a proper review of my last patch from an English speaking Mac developer.

[MacOSX] Fix for name collision with OSX headers, Maciej, Tomasz or others feel free to rework if you want/like

3D viewer: Commit patch to enable the rendering of wrl files generated with Meshlab. See https://bugs.launchpad.net/kicad/+bug/804778

ENDPOINT_T enum type

eeschema: fix the very minor bug  #1298094. But it was due to a bad bounding box calculation, which is now fixed.

(just replaced it with a member)

- SEGVIA becomes VIA
- Drill size moved from TRACK to VIA
- Removed shape from TRACK, becomes ViaType in VIA
- GetTrace becomes GetTrack, for uniformity
- Some minor constification and typo fixes

(for instance, when a footprint from the currently edited board is loaded in the footprint editor, and when the board is cleared or reloaded)
In footprint editor, the net names are no more shown od modifiable (becuase the footprint editor does not know anything about net names.
This change should allow the changes planned in pcbnew.

Add Python utility tools to make wizard scripts more easy to write.

the boost site is getting slower, somebody might need supply a better host and offer bandwidth there for downloading the boost tar.

*) void KIWAY::ExpressMail( FRAME_T aDestination, MAIL_T aCommand, const std::string& aPayload, wxWindow* aSource=NULL );
*) virtual void KiwayMailIn( KIWAY_EXPRESS& aEvent );
*) enum MAIL_T expansion into the brave new world if cross KIWAY_PLAYER communications.

Let the KIWAY_PLAYING begin.....
through well conceived mail from one KIWAY_PLAYER to another.
Get thinking now.  Add a new MAIL_T value, then send ExpressMail(), 
and receive it in KiwayMailIn(), it's that easy.

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