Added all failure reasons.
updated postbin url
Merge pull request #24 from natalieperna/patch-1

updated postbin url
Remove instances of non-functional postbin.
Merge pull request #23 from travelton/travis/fixes

Added all failure reasons.
Merge pull request #18 from mailgun/master

Update from master fork
highlight left main nav fix
Merge pull request #25 from leemunroe/master

Highlight main left nav fix
Fixed C# examples using the wrong event key.
Merge pull request #26 from travelton/FixCExamples

Fixed C# examples using the wrong event key.
Improve quickstart visual hierarchy
Merge pull request #27 from leemunroe/master

Improve quickstart visual hierarchy
Improve quickstart visual hierarchy
Merge pull request #28 from leemunroe/master

Improve quickstart visual hierarchy
Add edit link
Add mixpanel tracking to edit link
Merge pull request #29 from leemunroe/lee/edit-link

Add edit link to docs