More work about code refactoring in connect.cpp

* Grammar and spelling fixes in Eeschema, CvPcb, and Pcbnew path and
  library dialog tool tips.
* Translate the French file name subrill.cpp to highlight.cpp.
* Lots of coding style policy fixes.

* Factor auto save common code into base frame class so all frame windows
  can take advantage of the shiny new auto save goodness.
* Use a timer instead of depending on mouse and keyboard events to trigger
  an auto save.
* Check for auto save file when opening a board and ask user if they
  wish to use the auto save file or the last saved board file.
* Protect all base frame public members.

* Correct all user strings and comments for the correct capitalization of
  application names according to JP.  They are KiCad, Pcbnew, CvPcb,
  Eeschema, and GerbView.
* Add a note the the user interface policy about the correct capitalization.

* Add visible clearance when edit node or track segment,
  add parameter "show clearance for new or edited track with via area"
  in "Display options" menu.

and text dialog editor did not handle properly negative rotation angles values.

* Move auto save time global variables into PCB_EDIT_FRAME object.
* Move footprint library name list global variable int PCB_EDIT_FRAME
  object.
* Improve library back up and temporary file error message strings and make
  them translatable.
* PCBNew string unification.
* Translate French code names and comments.
* Coding style policy and Doxygen comment fixes.

* More common header file compiler fixes.
* Translate French code naming and comments.
* Remove global variable ScreenPcb.
* Dead code removal.

* All header files used to create the PCB common library now compile as
  stand alone code.  This prevents the need to define them in a specific
  order to make source code compile properly.  It should also now be
  possible to relocate the source code to build the common PCB library
  to a separate folder.

* Replace use of wxICON by new icons declaration.
* Remove unused files.
* Fix filenames inconsistencies between old and new icons.
* dialog_erc handle variable size icons in erc matrix.

* Add hotkey fast switch to two grids: for place and trace
	Alt+"1" - switch grid for place module
	Alt+"2" - switch grid for trace
  This two grid set in dialog - menu Preferences->Dimensions->Grid.
* Add hotkey switch grid:
	"`" - switch to next grid
	Ctrl+"`" - switch to previous grid
* Add hotkey switch track width:
	"W" - switch to next track width
	Ctrl+"W" - switch to previous track width
cmakemodules:
* Add GOST to KICAD_BUILD_VERSION if define KICAD_GOST.

* Changed <wx-2.8/xml/xml.h> to "xnode.h" in pcbnew_config.cpp to fix bug
  when building against wxWidgets 2.9 and above.
* Convert broken wxXmlNode code to use XNODE.
* Overloaded XNODE constructor for creating child nodes.
* Translate French naming conventions.
* Translate French comments.
* Remove tabs from several source files.
* Coding style policy and Doxygen comment fixes.

* Add hotkey "P" - place item
* Add record and play macros for sequence hotkey.
Macros set to numeric key 0..9.
<Ctrl>+<numkey> - start record macros
<hotkey> <mouse move> ... <hotkey>|<mouse place>
<Ctrl>+<numkey> - end record macros
<numkey> - play macros
* Add menu save/read macros to/from xml-file
* Add configure rotate angle for rotate module: 45 or 90 deg.
* fix segfault when move/drag segment if disconnected to pad

* Check user write permissions before saving project, board, and footprint
  library files.
* Append read only to file name and path in title bar when the user
  does not have write privileges.
* Rename class WinEDA_ModuleEditFrame to FOOTPRINT_EDIT_FRAME.
* Lot's of Doxygen comment and coding style policy fixes.

Minor fixes and enhancements.

Pcbnew: refresh issue with dialog designe rules under wxWidgets 2.9.2 under WINDOWS (replace wxChoiceBox by wxComboBox, should not change anything for users)
Eeschema: some  issues in libedit (when editing a pin )

All: fix a very minor issue: when a window is closed mazimized, and later reopened, it was not maximized.

fix an issue created by commit 2954. Gerbview: display now an indicator of layers in use. minor code cleanup.

* Rename EDA_Rect class to EDA_RECT.
* Rename EDA_TextStruct class to EDA_TEXT.
* Remove duplicate Doxygen comments from sch_sheet_path.cpp.

* Fix about dialog escape key termination bug.
* Fix edit hot keys dialog escape key termination bug.
* Set schematic editor component properties dialog default button.
* Fix schematic editor plot DXF dialog escape key termination bug.
* Set PCB editor layers setup dialog default button.
* Set PCB editor swap layers dialog default button.
* Set PCB editor net list dialog default button.
* Add comment to UIPolicy.txt about escape key termination requiring proper
  dialog button IDs.

* Set default button on all dialogs that do not already have a defined
  default button.  The only exception is the EESchema net list dialog
  which needs converted over to wxFormBuilder and due to it's design makes
  setting the default button in any tab other than the default tab
  problematic.
* Fix escape key dialog handling bug in EESchema print post script
  dialog.

* Remove clearance and net class name read only text boxes from PCBNew
  auxiliary tool bar.
* Display full net class information in message panel when an object that
  supports net classes is selected.
* Move coordinate string conversion function to EDA_DRAW_FRAME object and
  made it more versatile.
* Refresh message panel text when units change.

Pcbnew: dialog plot: make message window resizable, add tool tip and remove unused sizers.

Pcbnew: Fix a very minor issue in left toolbar. Add option in dialog bloc to move,copy ... items on invisible layers or not.