add basic color-coded legend
Merge pull request #75 from lippytak/legend

add basic color-coded legend
log ATM/Store click events in google analytics
Merge pull request #76 from lippytak/ga-events

log ATM/Store click events in google analytics
create separate goals for ATM and Store click tracking
Merge pull request #77 from lippytak/ga-events

create separate goals for ATM and Store click tracking
update metrics in readme