Get rid of github deployment

Summary:
No longer deploy to github.
We need a jar with dependencies to successfully create a fully independent executable, so use shade plugin to make that happen
A job can be made to share this uber jar somewhere.

Test Plan:
Used the created jar file to generate the files.

  jar -cp target/spragger-1.0-SNAPSHOT-jar-with-dependencies.jar com.scaledata.spragger.swagger.spray.SprayGenerator

Reviewers: soham, nitro, jd

Reviewed By: jd

Subscribers: eng

Differential Revision: http://phabricator.scale-data.com/D1144