Make expr fields readOnly on Add/Search pages
Fix database name in SmartDemoSetup/smart* files
Fix minor bug (undef var not used)
Improve error msg for bad external refs
Release stale locks on login
Add support for block editing

Add support for editing records in related blocks (e.g., recording
grades for all students on a class list).  Closes #63.

Remove Delete/"Drill-down" options and "completion analysis" from
tabular view, split view, and block add.  (The record add screen never
had those, so block add shouldn't either.  Tabular and split views are
more like reports.

Add ability to get to list view /original search results from tabular
and split views.  This is particularly important now that drill-down and
delete options are only available on list view.
Remove most Display All Entries buttons
Send all search results to a list
Fix an auth rule in demos
Minor fixes for imported fields, expressions
Hide action buttons when printing
Add to documentation (WIP)