Allow toggling of POST support. Add new toolbar icon numbers to riscos/gui.h svn path=/import/netsurf/; revision=490
Tidy code to reduce compiler warnings. htmlredraw.c and plugin.c produce the most now. Hopefully I haven't broken anything ;) svn path=/import/netsurf/; revision=451
New history window. svn path=/import/netsurf/; revision=418