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

Scripting: fix erroneous extension for S exp board files, which prevent to open a .kicad_pcb file from a python script
Make scripting version compilable on platforms where the python executable is not python2:
Just define it by -DPYTHON_EXECUTABLE=<python executable filename> when running cmake (there was already a partial fix for this)

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

Pcbnew: store in configuration the default line width (now  in mm), under a new keyword, to avoid a strange behavior of pcbnew in decimils version (old pcbnew versions), after running pcbnew in nanometers.

AUTHORS.txt: add some contributor names (I certainly forgot some other contributors, and I apologize).
Demos: convert .brd files to .kicad_pcb files and fix 2 broken files

Kicad manager: fix a recent bug: project tree not updated when kicad is launched by a command line with a project name to open.
Pcbnew: export vrml:
* move dialog functions to a new file: dialog_export_vrml.cpp (to be consistent with other dialogs).
* fix some coding style issues
* added patch from Cirilo Bernardo.

Kicad manager: fix a recent bug: project tree not updated when kicad is launched by a command line with a project name to open.
pcbnew: export vrml:
* move dialog functions in a new file: dialog_export_vrml.cpp.
* fix coding style issues
* patch add from cirilo Bernardo.

* 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.

3D viewer: allows  import of models created with openscad and convertedvia meshconv to wrl (thanks to Georg Gast <georg@schorsch-tech.de>)
Export VRML: fix scaling issue for pcbnew - nanometers.

EDA_LIST_DIALOG: add a filter option to select names to display is list, from a  kamil zorychta's patch <kamil.zorychta@gmail.com>
Use wxFormBuilder to create EDA_LIST_DIALOG_BASE, like other dialogs.
Minor code cleanup (remove unused functions and coding style fixes) and minor bug fixes.

Until now, 2 tracks were seen as connected only if one end of the first track is *exactly* on one end of the other track.
Now the 2 ends are seen as connected when they are "near" i.e. the distance between the 2 ends is < track width/2

Pcbnew: Fix unwanted selection clarification popmenu in board editor after double clicking on a DRC Unconnected error
 (For DRC clearance error, it was fixed  in bzr 3838, but forgotten for DRC Unconnected error)

Eeschema:commit patch <Prevent Eeschema from opening the same file twice> with a small fix for windows.

2) Add PCAD_PLUGIN to _pcbnew.so for scripting, fixing a linking bug.

Fixes a bug in the template file copying mechanism. The previous code failed to honour sub-directorys and flattened the whole tree whilst copying files.
I have fixed this so that sub-directories that are not the meta directory will get copied verbatim into the new project directory.

* Use the recent wxFileSystemWatcher to automatically update the tree project when a file is created/deleted/renamed in the project directory
(and if the file type is usually shown by the manager.)
Needs wxWidgets 2.9.4 or more recent.
* Also code cleanup, dead code or useless code removed.