Fix for issue #11: Better tagging UI w/ WebLit client support

* Removed equal column heights js for time being as it craps out when column heights change.
* Added subproject [fuzzyfox/webmaker-tagger](https://github.com/fuzzyfox/webmaker-tagger) to combine weblit tags + context tags into single input.
* Made a few tweaks to the tagging input UI beyond that to indicate its not just an input field.