[GRIDRPC-WG] charter

All, we found that charter document on the grid forge is outdated. I have - added Eddy as a co-chair - updated milestone in section 4.0 please review the attached and give comment on that. It is also available at gridforge https://forge.gridforum.org/sf/docman/do/listDocuments/projects.gridrpc-wg/d... -- HIDEMOTO NAKADA, GTRC, AIST