fixed issue #394
experimental branch now uploading to S3
updated README to provide more information about this releaase
added link to 0.3 issues to track progress
0.3, Forming right redirect url for enterprise

This fixes redirect loop for github enterprise users.

But I still got `Error retrieving currently authenticated GitHub user. Unauthorized` error.
Merge pull request #407 from floatdrop/patch-1

0.3, Forming right redirect url for enterprise
setting the github client API url for github enterprise
added email notifications
initial work to re-implement the GitHub status API (issue #403)