Add MappedVirtKeyboard class
Add MappedVirtKeyboard class

This is useful for virtual keyboard based on the usemap
attribute of an IMG tag

Signed-off-by: Pierre Mazière <de7336e35cef0f8a399cd781635c22e507b4a7ab@gmail.com>

frankrousseau/weboob,Konubinix/weboob,franek/weboob,eirmag/weboob,Konubinix/weboob,laurent-george/weboob,yannrouillard/weboob,eirmag/weboob,nojhan/weboob-devel,frankrousseau/weboob,frankrousseau/weboob,RouxRC/weboob,franek/weboob,willprice/weboob,yannrouillard/weboob,Boussadia/weboob,Boussadia/weboob,sputnick-dev/weboob,RouxRC/weboob,willprice/weboob,RouxRC/weboob,sputnick-dev/weboob,willprice/weboob,nojhan/weboob-devel,nojhan/weboob-devel,laurent-george/weboob,sputnick-dev/weboob,Boussadia/weboob,laurent-george/weboob,Konubinix/weboob,franek/weboob,Boussadia/weboob,eirmag/weboob,yannrouillard/weboob