When sending bulk email check if course is authorized.
Also the idash_mode property is stored seperately for each course.

LMS-2565
Fixed and added more tests for bulk email.

LMS-2565
BLD-715: StringResponse i18n.
Reset the jenkins ruby environment before tests run
Merge pull request #3590 from edx/anton/i18n-string-response

StringResponse i18n.
BLD-721: SymbolicResponse i18n.
Merge pull request #3552 from edx/usman/lms2565-bulk-email-display

When sending bulk email check if course is authorized.
Merge pull request #3607 from edx/anton/i18n-symbolic-response

SymbolicResponse i18n.
Merge pull request #3603 from edx/db/jenkins-reset-ruby

Reset the jenkins ruby environment before tests run
added a new topic on interpreting score histograms
Merge pull request #3524 from edx/ahodges/documentation/DOC286

added a new topic on interpreting score histograms
Corrected the change log
Merge pull request #3610 from edx/ahodges/documentation/changelogfail

Corrected the change log