updated the changelog
updated the changelog

viniciusnz/savon,Eric-Guo/savon,travis-repos/savon,BlaneCordes/savon_vertex,billr578/savon,latortuga/savon,mpangrazzi/savon,zerobatu/savon,advishnuprasad/savon,SICSoftwareGmbH/savon,savonrb/savon,rtrepo/savon,oafridi/savon,payfriendz/savon,enahum/savon