Add new IDL file documenttarget.idl
Update constants required for mshtml.idl
Add new IDL interface for dimm-API.
Add IDL interface for mshtmhst-API
Write new IDL for mshtml-API.  Partial autogenerated by TLB (genidl), and
manual transtion from header to IDL-file for widl.
Add new interface and definition header for IDL docobjectservice-API.
Regernate headers, make sure BSTR defaultvalues are prefixed by L.
Regenerate + defaultvalue for BSTR correction
Add new idl-files to build