Update readme.md for 1.0.0 release
Update readme.md for 1.0.0 release

OurHealth/ruby-saml,zipnosis/ruby-saml,Crushpath/ruby-saml,18F/ruby-saml,greggersh/ruby-saml,10Kft/ruby-saml,onelogin/ruby-saml,itrp/ruby-saml,jobscore/ruby-saml,InviteEducation/ruby-saml,ksinkar/ruby-saml,yidimu/ruby-saml,kaligrafy/ruby-saml,ylansegal/ruby-saml