update source link
update coverage script and comment it

it was still living in the old node-based testing days
it's kind of noisy but still helpful
add recent authors
make heatmap radius accessors chainable

fixes #610
continue to clean up / document, the doc coverage tool

this is even more amazing than i thought
update comments with better understanding

and check in a log (commented out) that may help
to figure out the false positives

remove wrong fix for false positives
major documentation cleanup

fixes #290: document all public API methods. the automatic verification is too noisy
to be sure, due to a possible bug in the script, and due the bazillion internal methods which are
not _prefixed.  but i think it's really all methods now.
fixes #615: handling line chart undefined/null values was implemented but not documented
fixes #610: disabling heatmap cell corner roundeed was implemented but not documented
fixes #441: document dc.filters

hundreds of grammatical fixes and clarifications too!
fix radius setting

look, testing makes refactoring safe!  yay!
Merge branch 'master' of https://github.com/dc-js/dc.js