timestamp has been added to grp sync item
updated data service and grps to deal with this
added msg and grp meta types which serves to hold meta data of grp and msg
removed observer temporarily
updated nxs item tests, need to update data service tests
git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-new_cache_system@5256 b45a01b8-16f6-495d-af2f-9b41ad6348cc
updated rsnxsitems with discrete msgs and grp item rather than collection of msgs/grps
added flags header file
added first declaration of implemented genexchange service (client API interface)
git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-new_cache_system@5180 b45a01b8-16f6-495d-af2f-9b41ad6348cc
nxsitems not tested yet
renamed retrodb src file to .cc regular librs naming convention
wrote deserialisation section of nxsitems, need to write print and clear rsitem base functions
git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-new_cache_system@5144 b45a01b8-16f6-495d-af2f-9b41ad6348cc
