Production PR for #1945 (In-line report for interactive quizzes)

Master PR already pulled.

$ git cherry-pick 6190b8e
[dca_production_copy4 610a1c6] #1945; Interactive quiz summary in-line report.
 Author: dcadams <dcadams@.stanford.edu>
 5 files changed, 161 insertions(+), 1 deletions(-)
 create mode 100644 main/courses/reports/generation/gen_in_line_reports.py
 create mode 100644 main/templates/reports/in_line.html

git cherry-pick e14434b
[dca_production_copy4 f288e83] @jrbl's comment for #1946
 Author: dcadams <dcadams@.stanford.edu>
 2 files changed, 2 insertions(+), 2 deletions(-)