Remove defunct log migration script.

It now lives in the gatekeeper nodejs project, where it can share functionality
with the normal log processor.
Make the elasticsearch server configurable.
Fix asset precompilation.

Handlebars was breaking things due to the handlebars.js.nuspec inside the
submodule utterly confusing the asset pipeline.
Merge branch 'master' into gsa

Conflicts:
	Gemfile.lock
Add production elasticsearch server to connect to.