Added pypjua.applications.presence package

darcs-hash:20090211072315-1e3d8-688eb61ecbfae284df0668188d0ffbce410b5cdc
Added imports from presence modules in applications.presence

darcs-hash:20090211153348-1e3d8-68a823e870ee8b29ae53673e5e0eea286989ade6