clean up base directory by moving misc public files to /assets/misc
tighten up the routes file
set a bunch of meta tags on package pages
Merge pull request #182 from npm/meta-tags

set a bunch of meta tags on package pages
Merge pull request #181 from npm/basedir-cleanup

Basedir cleanup
move /ping and /status to /_monitor/ping and /_monitor/status
adds the 200 status code back in for /ping