Version bump to 0.2.8
Version bump to 0.2.8

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