Added info of ntlm and basic auth in the README.rdoc
Added info of ntlm and basic auth in the README.rdoc

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