* Replace all known instances of (const wxChar*) casts to GetChars() for
  wxWidgets 2.9 compatibility.
* Cleaned up get component dialog so last part gets saved on wild card
  selections.
* Remove redundant schematic component drawing code.
* Added SCH_COMPONENT constructor to create new component from library
  component object.
* Add message panel helpers to WinEDA_DrawFrame and update old message
  panel access code.
* Using library viewer to add component to schematic now respects unit
  and body style selection.

Big cleanup of sourcetree root structure, added Documentation subfolder, moved packaging stuff for osx and windows (nsis) to packaging.

* Create single event handler for grid size events.
* Fix all frame windows to use new grid size event handler.
* Use offset relative to ID instead of ComboBox index to save last grid size.
* Move last grid size load/save setting into WinEDA_DrawFrame.
* Add equality and assignment operators the GRID_TYPE.
* Add current grid helper methods to BASE_SCREEN.
* Add GetPins helper to LIB_COMPONENT to replace GetNextPin where applicable.
* Add AppendMsgPanel helper to WinEDA_DrawFrame.
* Improve rounding for display of coordinates when millimeter units are selected.

fixed a minor problem in pcbnew compiled in DEBUG mode, that prints a lot of error messages when loading a board

Fixed problems in libedit and crashes when no component loaded

* Replace component library editor new component dialog using wxFormBuilder.
* Rename component library draw items to conform to current coding standards.
* Add GetWidth() method to component library draw objects.
* Add regular expression key word search capability to component library object.

pcbnew: more about netclass work

* Library component draw items now stored in Boost ptr_vector.
* Updated draw item object comparison to include greater and less than condition.
* Moved set parts per package code from component edit dialog to component object.
* Moved set alternate body style code from component edit dialog to component object.
* Tweaked component library file draw item sort order for improved file readability.
* Documented component object draw item sort ordering.
* Moved plot code to the appropriate library component and draw item objects.
* Fixed compiler type conversion warning in plot_common.h.