Release v1.72.1

Whats new:

* transparent data lists
* list of corpora in the corpus dropdown
* tweeks to layout and css
* enteredByUser modifiedByUser in the datum (instead of the session, since the sesion could be many people)
* time spent added to datum activities for psycholing experiments and/or ad hoc user studies about how we can make data entry less painful
* comments are entered in chronological order, and made the new comment area less obvious

Whats left to do:
* search with word boundaries