create hash of questions by tag
move build summary groups out of collection builder
add group by tag boolean field
Create TagGroup class
Test and simplify TagGroup; sort tag groups

Move grouping by tag into TagGroup for better clarity and code
organization and easier testing
long session timeout for dev env
Group by tag control in report edit pane
Display report grouped by tag with tag headers
Update display
update tag group test
Group by tag feature test
cache jquery selector for efficiency
Fix bugs identified by testing
Merge branch '519_standard_form_report_group_by_question_tag' into develop
Fixed timing issue with form spec
Fixed stray report_report references
Merge branch 'develop' into staging