Add ajax function to update words left, time left, and pace needed when current wordcount is updated.
* add span classes to goal wc, words left, time left, and pace needed in _current_project partial for this and future edit form ajax.
* change form_for on _new_current_wordcount partial to remote: true instead of method: patch.
* update project controller update action to return json to ajax function.
Remove commented-out lines from projects controller update action.
Merging ES_ajaxifying_currentwc_update into master; resolving merge conflict.
Merge branch 'master' into ES_ajaxifying_currentwc_update
Merge pull request #73 from tiger-swallowtails-2014/ES_ajaxifying_currentwc_update

Add ajax function to update words left, time left, and pace needed when ...
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