pcbnew: fix print format in THROW_IO_ERROR
        fix properties file export_vrml.cpp

* Complete encapsulation of the ZONE_CONTAINER class.
* Fixed a bug in the EDA_TEXT::Format() default effects behavior due to
  improper conversion to internal units and missing test for default
  thickness.
* Improved grammar of some Pcbnew context menu strings.
* Moved some more cleverly hidden BOARD object methods into class_board.cpp.
* Lots of coding policy and documentation fixes.

* Complete encapsulation of the MODULE class.
* Complete encapsulation of the EDA_TEXT class.
* Encapsulate most of the ZONE_CONTAINER class.
* Add pcbcommon library as a dependency for reSWIGging the scripting
  support.  This should cover most dependency cases.

Pcbnew: fix issues:   Ensure pads type connector  have a drill size= 0, like SMD pads. Ensure keepout zones have no net.

Pcbnew: Partial merge from pcad2kicad (from Alexander Lunev). Fix an old bug related to pads with offset: sometimes the connection to a zone was not detected.

* Make Pcbnew net list dialog honor escape key on Linux.
* Make Pcbnew swap layers dialog honor escape key on Linux.
* Layout and UI policy fixes for Pcbnew swap layer and net list dialogs.
* Layout and UI policy fixes for Eeschema plot dialog.
* Rename fpip.h to fpid.h.
* Fix FPID class compiler errors.
* Restore fpid.cpp to Pcbnew static library source list.

Pcbnew: plot Dialog: add a popup menu (try mouse right click in plot dialog) to selected/unselect groups of layers to plot.
All: For new zoom centering option: use Shift+Ctrl key instead of Alt key to select the new zoom centering, because Alt key has a special function under Windows.
2 very minor other changes.

* Improve the stable and testing build version option logic.
* Use CMake FindPythonInterp to configure the Python interpreter.
* Use Python interpreter to determine the system Python module install
  path if not already defined on the command line.
* Add header symbol checks for asinh(), acosh(), and atanh().
* Add test source to check for isinf() which can be defined as a C++template.
* Replace conditional compile on windows systems for aXXXh() with CMake
  configuration tests.
* A few minor MSVC compile fixes.
* Fix incorrect python environment string in fixswigimports.py
* Create a separate document for KiCad CMake build options.
* Create a separate how to compile KiCad on Windows document.

Pcbnew: Try to find a better workaround for zone fiill bug (crash or bad fil areasl in very rare cases).
pcbnew+Eeschema: Fix a very minor bug: filename not displayed in frame reference.

Very minor other fixes.

added option to allow zooming around the crosshair instead of the center; can be enabled via options or by holding alt while using the mousewheel

Changes for CvPcb to eeschema stuff file: the stuff file generation from CvPcb is removed. Eeschema now imports footprints names from the .cmp usual file created by CvPcb or by Pcbnew (Why to use 2 file formats for the same thing?) .
Pcbnew: in netlist dialog: The user now can choose between the netlist and the .cmp file to import footprints names.
Therfore no need to delete the .cmp file when exists to use only the netlist.
This is useful for users who use CvPcb only once to fill footprints fields in schematic, and after edit/modify the footprints fields in schematic outside CvPcb.

Fix bug in  TestSegmentHit( wxPoint aRefPoint, wxPoint aStart, wxPoint aEnd, int aDist ), when aDist = 0. (fix Bug #1106744 )

Pcbnew: fix a very old bug in DRC, pad to pad drc tests: sometimes a test between a rectangular pad and an oval pad was skipped.
Segment Hit Test: enhanced detection near segment ends (noticeable for instance when clicking on short tracks in Pcbnew.
Remove duplicate code about segment hit test.
remove unused file.

Pcbnew: fix bug Bug #1101399 (Custom page size gets reset after restarting pcbnew) (bug also in eeschema)
Try to find a better fix for Bug #1100876

Enhance DIALOG_SHIM to optionally call SetFocus() after the derived class's constructor has been called, for wx 2.8 and wxGTK

 Make scripting version compilable on platforms where the python executable is not python2 (define it by -DPYTHON_EXECUTABLE=<python executable filename>)

* Improve MSG_PANEL_ITEM to handle message panel information.
* Create containers for passing message panel items between objects and
  the message panel.
* Rename EDA_ITEM::DisplayInfo to EDA_ITEM::GetMsgPanelInfo.
* Remove all direct manipulation of EDA_DRAW_FRAME from all objects derived
  from EDA_ITEM.