Update sendgrid.html.md

Updated managing services section
Update sendgrid.html.md

Updated Using SendGrid and Sample Apps
Fixing confusion over VCAP_SERVICES
Fixing Shannon's feedback on some wording
Merge pull request #137 from duvander/master

Update sendgrid.html.md
Update sendgrid.html.md
scott comments
scott comments
glindex xrefs
fixed link in glindex, add xrefs in ruby svc bindings page
fix for story 51851471
glindex typos
stated auto-config support per story 52020045
Ruby redis cloud docs have correct hash syntax and json formatting.
stated tunneling does not work in v2 per story 53332953
Merge pull request #138 from pivotal-vmware/master

Ruby rediscloud docs have correct hash syntax and json formatting
Merge branch 'master' of github.com:cloudfoundry/cf-docs
corrected auto-config support table
rewrite of domains and routes page
fixed links to updated domains page