first pass, untested
missed a few items
Merge pull request #11 from misterbisson/master

Sync from master
Merge branch 'master' of github.com:misterbisson/bstat into abtests
changed sql table definition
Merge branch 'abtests' of github.com:misterbisson/bstat into abtests
no more x8
Merge branch 'master' of github.com:misterbisson/bstat into abtests
added some notes
wip
wip
wip
added all_sessions method, corrected cache key
whitespace cleanup, added todos
Merge branch 'master' of github.com:misterbisson/bstat into abtests
Merge branch 'master' of github.com:misterbisson/bstat into abtests
wip
fix stored cookie values
support for tracking the ab test variations
scrub logging