* 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.
* Rename all ADD_MENUITEM_* functions to AddMenuItem and move them to
wxstruct.h since they are used by the Kicad main frame classes.
* Move SET_BITMAP and SETBITMAPS definitions to wxstruct.h.
* Fix a bug in SET_BITMAPS that prevented enabling menu item images on
OSX.
* Rename MsgItem to EDA_MSG_ITEM.
* Remove redundant includes from modified files.
* Doxygen and coding style policy fixes.
* Add in help menu a direct link to the new doc Getting_Started_in_KiCad.pdf, written by contributors (useful for beginners)
* Fix other very minor issues in CvPcb.
* Update howto doc about translation