Add simple Hit model to store hits for a host
Add simple importer for adding hits from a tsv file
Meh
Add container-fluid to footer to give it some padding
Add some simple table styling to index listings
First (simple) cut at showing hits for a host
Make hit more useful and robust:

1. hits table is now case sensitive
2. path is now 1024 chars limit (to cope with large query strings)
3. it has a unique index on path, host, hit_on, and status
   (but we really use a hash of path because mysql won't index on keys > 1000 bytes)
4. ordered by count descending on the show page