CLC-4591, Bump master versions/application.txt to 49
CLC-4587 - Disabled X-Frame-Options:DENY header for UserApiController#am_i_logged_in as well as all endpoints served by CanvasCourseGradeExportController
OEC-486, rake oec:courses requires clean directory; no dep on timestamp
CLC-4595 - Update gems - angular

https://jira.ets.berkeley.edu/jira/browse/CLC-4595
CLC-4595 - Update gems - autoprefixer-rails

https://jira.ets.berkeley.edu/jira/browse/CLC-4595
CLC-4595 - Update gems - icalendar

https://jira.ets.berkeley.edu/jira/browse/CLC-4595
CLC-4595 - Update gems - ng-annotate

https://jira.ets.berkeley.edu/jira/browse/CLC-4595
CLC-4595 - Update gems - secure_headers

https://github.com/twitter/secureheaders/releases

https://jira.ets.berkeley.edu/jira/browse/CLC-4595
CLC-4595 - Update gems - signet

https://gemnasium.com/gems/signet

https://jira.ets.berkeley.edu/jira/browse/CLC-4595
CLC-4595 - Update gems - page-object

https://gemnasium.com/gems/page-object

https://jira.ets.berkeley.edu/jira/browse/CLC-4595
Merge pull request #3188 from redconfetti/CLC-4587-xframe-deny-requests

CLC-4587 - Resolving issues caused by X-Frame-Options header with LTI tools in Safari
Merge pull request #3187 from johncrossman/CLC-4591

CLC-4591, Bump master versions/application.txt to 49
Merge pull request #3189 from johncrossman/OEC-485

OEC-486, rake oec:courses requires clean directory; no dep on timestamp
Revert "CLC-4587 - Resolving issues caused by X-Frame-Options header with LTI tools in Safari"
Merge pull request #3190 from christianv/CLC-4595

CLC-4595 - Update gems - page-object / signet / secure_headers / ng-annotate / icalendar / autoprefixer-rails / angular
Merge pull request #3191 from ets-berkeley-edu/revert-3188-CLC-4587-xframe-deny-requests

Revert "CLC-4587 - Resolving issues caused by X-Frame-Options header wit...
OEC-486, oec rake tasks put CSVs to directories based on conventions in svn:OEC
OEC-485, yml config name from export_directory to export_home to avoid confusion
OEC-485, spec to verify export_directory constructed by Oec::Export
OEC-471, add column DEPT_FORM to primary courses.csv file