total and average familiarity

finished those methods
Adding verifies files for the vulnerability methods and the num of experienced developers method
Added stats for the CodeReview.security_experienced_participants
added histogram to stats.rb and filled in the collaborator familiarity method there
Renaming production run directory
Forcing ./tmp/gitkeep
Don't need this anyway
First crack at the test run script
Tweaks to the rake run:stats timing stat
Commenting up the .gitignore
Taking out repetitive stats output
Removing gemspec
Disabling slow query
Merge branch 'master' into performance-up

The big performance merge of 2014

Conflicts:
	.gitignore
	lib/chromium_history/stats.rb