* Makefile.in : add gtkhtml dir.
* configure.in : expand gtkhtml/Makefile
* api/Makefile.in : remove gtkhtml-api.xml
* generator/CodeGenerator.cs : parse new --outdir, --customdir,
and --assembly-name args.
* generator/GenerationInfo.cs (Ctor): new (dir, dir,assembly) ctor
* gtkhtml/HTMLStream.custom : moved here from gtk dir
* gtkhtml/gtkhtml-api.xml : moved here from api dir
* gtkhtml/Makefile.in : gen source and build dll
* sources/gtk-sharp-sources.xml : write gtkhtml api to new dir
svn path=/trunk/gtk-sharp/; revision=18696
