Added a freshly installed Blacklight rails application dir.

Used this process to create the directory:

rails new discovery
pushd discovery
	echo gem \'blacklight\' >> Gemfile
	echo gem \'therubyracer\' >> Gemfile
	bundle install --path vendor
	rails generate blacklight:install --marc --skip
	rake db:migrate
popd

*** Note, this implies we're not choosing a specific version of blacklight
*** This initial version built with Blacklight v5.3.0, released last night