Fix metadata section popovers not closing, and save indicator not updating

it would be good if i could spell properly.

update our deployment command in circle.

support RDS environment variables in our bin/start script

Dockerfile 

Bump dependencies.

fix em dash

highlight file path as code

more consistent highlighting

State that only H2 and Postgres are available

add exceptions for epl libraries

Move tools.reader dep to :dev since it's only needed for expectations

Start Jetty earlier in process so Heroku boots don't fail

Surface HTTP errors for the dataset endpoint (Heroku, etc)

Formatting date/times by granularity

Re-enable null/not-null for dates.

User profile to react

Fix duplicate titles in OS X app

make it possible to complete the initialization process from outside the metabase.core namespace and trigger it in our test setup process so that logins work for unit tests again.

add a quick conditional to our current-user-id middleware to ensure it doesn't attempt to validate the session if we haven't initialized the app yet.