exception while exporting user csvs for non ajax request fixed

Updated Sphinx doc for:

1. Curation Workflow Diagram
2. gStudio implementation diagram for CLIx
3. Restructuring of index

Merge pull request #1947 from katkamrachana/widget-updates

Access-privileges for Teacher agency-type users

Merge pull request #1842 from katkamrachana/master

script for misc purpose in release3 for MZ state

var name changed for buddy assessment analytics

pull transcript data/file with class in dump.

Updated 'sync_users.py' script to add 'Teachers' for elements and 'St…

…udents' for others in agency_type field of Author instance

Merge pull request #1753 from katkamrachana/misc-updates

Update on Interactions

Merge branch 'dlkit' of https://github.com/gnowledge/gstudio into sec…

…tion

showing help group to all types of users