Add instructor notes to document

Add template instructions for course teams, letting them know where
they should modify the text according to their courses
Change course_id to package_id
on new Locators to make it clear that they have a different syntax
than Location.course_id altho they represent the same info.
Moved bok-choy page objects and setup.py to common/test/bok_choy
Merge pull request #2025 from edx/will/saner-page-object-structure

Moved bok-choy page objects and setup.py to common/test/bok_choy
Add base package to edxapp page object setup.py
corrects typo in legacy.py (LMS-1675)
Merge pull request #2028 from edx/adam/fix-error-student-data

corrects typo in legacy.py (LMS-1675)
Merge pull request #2027 from edx/will/fix-page-object-install

Add base package to edxapp page object setup.py
Merge pull request #2022 from edx/dhm/locator_course_id

Change course_id to package_id
Update formatting for notes to instructor

Change formatting for notes to instructor from table to warning
Merge pull request #2021 from edx/sylvia/documentation/ORA-279

Add instructor notes to document
Removed extra file

Removing long-file-name, stray file from earlier commit
Merge pull request #2035 from edx/markhoeber/documentation/remove_stray_file

Removed extra file
Grading types should not allow empty field for "Total Number" and "Number of Droppable"
STUD-988