Export UMD from webpack

Add `sourceOrder` option, bump alpha version

Closes jedfoster#132

Ugh. One of these days I'll figure out how to properly publish

Bump alpha version

Bump version to 2.2.1

Update minified script

Bump version to 2.1.0

Minor merge cleanup

Fix collapsedHeight logic

Fixes jedfoster#77. Wasn't properly using `max-height` set in CSS.

Fix version conflict