New package gWidgetsWWW

The gWidgetsWWW package leverages the Rpad infrastructure allow
dynamic webpages to be built using the gWidgets API. In addition the
Rpad package for R, these pages use the EXTJS javascript libraries
available at www.extjs.com.

Att this point, much of the gWidgets API is implemented, but certainly
not all. In addition, some extenstions are being tried out. The
gaction contructor is used to make reusable action components for
menubars and buttons. The ggooglemaps constructor gives some access to
the Google maps interface.

Bug reports and comments are welcome.