Include HTTPS scheme in github API url

Ensures the github API url includes the HTTPS scheme - fixes
https://issues.jenkins-ci.org/browse/JENKINS-16921
Merge pull request #8 from acoulton/patch-1

Include HTTPS scheme in github API url
Repo url no longer assumes https
Merge pull request #34 from postalservice14/getRepoUrlNonSecure

Repo url no longer assumes https