use linkOpaque.png instead deprecated linkOpaque.gif
autoformat, jshint
jq 1.7+ change: on instead of live
jq 1.7+ change: prop instead of attr
add changelog, fix metadata, package housekeeping
bind events on document to mimic behavior of deprecated jquery live
Revert "jq 1.7+ change: prop instead of attr"

This reverts commit f7c96d43c09f6ac8df5120b07bcf1f27f7c5ccc4.