added xpath note
added xpath note

rtrepo/savon,mpangrazzi/savon,viniciusnz/savon,BlaneCordes/savon_vertex,advishnuprasad/savon,enahum/savon,billr578/savon,travis-repos/savon,savonrb/savon,oafridi/savon,latortuga/savon,SICSoftwareGmbH/savon,zerobatu/savon,payfriendz/savon,kimptoc/Savon-with-username-token-digest,Eric-Guo/savon