removed coffeescript test and moved watchdog to base requirements
added check when search is deleted to remove orphan references
single reference editing now available
edit reference only shown when user has permissions
show success message with lit is tagged
edit all references with the selected tag (but not descendants)
copy an existing literature search from any assessment
fix error when cleaning model with unspecified units
enable data-pivot extensions whenever fields are specified in input files
increase password reset time
add ReportTemplateModel; and ability to add new report-templates
make get_viewable_assessments a class-method
create welcome-email when adding a new user to HAWC, including instructions

to reset their password
add welcome-email message templates