Prevent keyzen from capturing keypresses which include Ctrl/Alt/Cmd modifier keys. These are likely browser/OS keyboard shortcuts and keyzen prevents the default event from firing, so this can be quite annoying in some browsers.
Merge pull request #5 from morgant/IgnoreCtrlAltCmdModifiers

Prevent keyzen from capturing keypresses which include Ctrl/Alt/Cmd modifier keys
add simple metrics
add hits per minute and ratio metrics as well
refactor
Merge pull request #6 from damienklinnert/master

Add simple metrics for measuring progress