* Add default OS program install path(s) to search path list as fail safe.
* Remove unnecessary wxGetApp calls in WinEDA_App class methods.
* Remove non-standard message panel font and changed background to system menu color.
* Remove italic fonts from menus.
* Remove non-standard font in Kicad app project tree.
* Remove font selection dialog menu items from apps for removed fonts.
* Remove all global variables and settings associated with the removed fonts.
* Fixed PCBNew export and import library file dialog response tests from wxCANCEL to wxID_CANCEL.

Global variable unobfuscation, new library path search, and lots of other changes.  See CHANGELOG.txt.

Mandatory in Pcbnew to handle without error metric grid used now for some footprints (BGA, connectors)
Not fully tested

Integrate wxFileHistory, add missing header files to fix Linux build, initial search path work, and general housekeeping.

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gerbview: add french translation, G55 command (a do nothing command) and solved a bug that can crashes gerbview with files without any DCODE tools info.

Improved grid implementation, 3D viewer debug assertion fix, moved drawpanel.cpp to common library, and added WinEDA_Appl declaration.