if PERSONA_WITH_COVER, do a graceful shutdown so cover can generate .coverage_data
package.json: upgrade to bcrypt-0.7.3

Upstream says this fixes a memory issue.
automated tests readme updates
upgrade to awsbox 0.3.4
Merge pull request #2893 from mozilla/2892-new-bcrypt

package.json: upgrade to bcrypt-0.7.3
Merge pull request #2911 from mozilla/awsbox_upgrade

upgrade to awsbox 0.3.4
Merge pull request #2808 from jrgm/fix-coverage-for-static-daemon

if PERSONA_WITH_COVER, do a graceful shutdown so cover can generate .coverage_data

close #2807
catch urls that express cannot handle and return 404