Fix issue in bga footprint wizard.
Eeschema: fix unwanted creation of noname.pro (or other useless config file), when opening eeschema. Fix also an issue when saving the config (from save config menu) which saved the config file in an unknow folder.
Modular-Kicad milestone B), major portions:

*) Rework the set language support, simplify it by using KIWAY.  Now any major
   frame with a "change language" menu can change the language for all KIWAY_PLAYERs
   in the whole KIWAY.  Multiple KIWAYs are not supported yet.

*) Simplify "modal wxFrame" support, and add that support exclusively to
   KIWAY_PLAYER where it is inherited by all derivatives.  The function
   KIWAY_PLAYER::ShowModal() is in the vtable and so is cross module capable.

*) Remove the requirements and assumptions that the wxFrame hierarchy always
   had PCB_EDIT_FRAME and SCH_EDIT_FRAME as immediate parents of their viewers
   and editors. This is no longer the case, nor required.

*) Use KIWAY::Player() everywhere to make KIWAY_PLAYERs, this registers the
   KIWAY_PLAYER within the KIWAY and makes it very easy to find an open frame
   quickly.  It also gives control to the KIWAY as to frame hierarchical
   relationships.

*) Change single_top to use the KIWAY for loading a KIFACE and instantiating
   the single KIWAY_PLAYER, see bullet immediately above.

*) Add KIWAY::OnKiwayEnd() and call it from PGM_BASE at program termination, this
   gives the KIFACEs a chance to save their final configuration dope to disk.

*) Add dedicated FRAME_T's for the modal frames, so m_Ident can be tested and
   these modal frames are distinctly different than their non-modal equivalents.
   KIWAY_PLAYER::IsModal() is !not! a valid test during the wxFrame's constructor,
   so this is another important reason for having a dedicated FRAME_T for each
   modal wxFrame.

On balance, more lines were deleted than were added to achieve all this.
Change order of headers for wx 2.8, use wxWindowDisabler not ENABLE_DISABLE.
Constification of HitTest and GetParent
In particular HitTest for zones *do not* select the nearest vertex/edge as a side effect
Modular-Kicad milestone B), minor portions:

*) KIWAY_PLAYER::IsModal() is now a retained state, controlled by SetModal()

*) Fully re-work the KIWAY_PLAYER::ShowModal() to use a nested event loop.

*) Add support to DIALOG_SHIM for a "quasi-modal" dialog presentation and mode.
   See top of dialog_shim.cpp about that for benefits and need.

*) You can now pick footprint from the schematic component field dialog, although
   if you do this before you open the BOARD, you will only get the global footprint
   libraries, not also the project specific ones.  Opening the BOARD first avoids this
   problem.

This is the first example of cross KIFACE invocation, it is also the first
instance of using a TOP_FRAME other than FRAME_PCB as the first thing. It works,
but it's missing support for opening the project specific table because
historically the FRAME_PCB did that. This is now starting to expose all the near
term needs for KIWAY_PLAYER <-> PROJECT interaction, independence and out of
sequence usage.

A fix for this will be coming in a few days.

However it mostly starts to show why the KIWAY is terribly useful and important.
wx 2.8 now builds, but the quasi-modal support seems broken on 2.8.  Wanted others to be able to build at least.
typeinfo.h missing in Debug build for wx2.8
Quasimodo is not a monster, he is your friend.
footprint editor: fix crashes. In this fix, I removed the assumption the parent frame is the board editor.
However, this assumption is still present here and there  in the moduleframe code.
Upstream merge.
Kicad: fix crash on exit, when Libedit was called during a session. It fixes also a crash if Libedit was called, closed and reopened.
Happens only if eeschema was called from the Kicad manager.
Modular-Kicad milestone B), glamorous portions:

*) Eeschema can now show the footprint editor.

*) Eeschema can now invoke the footprint picker from the library part field editor.

*) KIWAY_PLAYER::ShowModal() takes aResultantFocusWindow that tells what window
   to give the focus to.  Required since frames are often near the top of the
   hierarchy and they are invoked by a peer, not a parent.
Fix new bug which crashed pcbnew running under kicad.exe while adding a new module in mod editor
Allow building of a STABLE or TESTING version using kicad-install.sh.
Missing const caused unpickability of tracks
peggable checkout version in scripts/kicad-install.sh
OSX: fix incorrect path to launch pl_editor.
fix also a bug in python script round_value_robin.py.
Try some new Mac support ideas.
Fix an annoying behavior of new quasi modal frames  on Windows (when closing them, the caller frame was no more on top )