Workarounded SWIG problems (does not support nested C++ classes, more on the subject: http://www.swig.org/Doc1.3/SWIGPlus.html#SWIGPlus_nested_classes).

Rework on 3D viewer (work in progress): Disable or enable layers, grid or 3D footprint shapes should be now faster.

* Make block rotate command honor the rotation angle setting.  Thank you
  Umesh Mohan <mohan.umesh@gmail.com> for the patch.
* Change block rotate undo command from UR_ROTATE to UR_CHANGED so consecutive
  rotations do not lead to round errors and for proper undo in case the user
  changes the rotation angle setting between block rotations.

* Handle different item global deletions correctly.  No more removing of text
  if graphics is selected.
* Layer settings are always obeyed for modules, zones, text, and graphics.
* Text will be removed from copper layers if all layers are selected or
  according to the current layer.
* Added check boxes for "normal" and "locked" footprints to be consistent
  with the naming for the track deletion options.

Commit patch about  cvpcb, pcbnew and layout editor menu items, with 3 menu labels modified in Eeschema.

Fix also other very minor issues.
Realistic mode shows or not the copper thickness (depending on selected option in preferences) to speed up the screen redraw.

Fix for bug #1285878, build fails with clean repository and high parallelism due missing dependance between router and pcbcommon

[MacOSX] Avoid race between cmake -E copy_directory, which triggers a build error when using an high parallelism

Renamed BOARD_CONNECTED_ITEM::SetNet() -> SetNetCode()
Added BOARD_CONNECTED_ITEM::GetNet() for accessing NETINFO_ITEM* of a given item.
Fixed module editor crash when launched to edit a module from a PCB.
Replaced some BOARD::FindNet( item->GetNet() ) calls with BOARD_CONNECTED_ITEM::GetNet().

Fix minor bug in eeschema (opening a relative path does not work) (patch from HennerZeller).

Fix a minor error in class D_PAD: void D_PAD::Flip( int Y ) changed to virtual void D_PAD::Flip( const wxPoint& aCentre ) (as defined in BOARD_ITEM)
Scripting: fix compatibility current pcbnew version in 2 examples and the default extension of board files  in board.i (was .kicad_brd, now is .kicad_pcb)

Fixed case for the footprint legacy plugin when added module's do not have set parent (BOARD).
Added copyright notice for pcbnew/class_netinfolist.cpp (feel free to correct, it is just copied from corresponding header file).

gr_basic.cpp: rewrite the function which draws the outlines of a thick segment.

  Factored out the next-pad-number function