Merge pull request #17 from steveprentice/jenkins_notification_fix

Fix _parse_jenkins_json to handle application/json content-type.
Merge pull request #18 from steveprentice/build_on_reopen

Initiate build when PR is reopened.
Merge pull request #16 from steveprentice/github_enterprise

Add GitHub Enterprise support and API token authentication.
bump version to 0.1.5
Allow JENKINS_URL to be a repo_config setting.