CLC-3864: Webcasts: change link to iTunes U to "Also available at <link> iTunes U</link>"
https://jira.ets.berkeley.edu/jira/browse/CLC-3864
CLC-3900: Additional rules for JSCS
https://jira.ets.berkeley.edu/jira/browse/CLC-3900
Merge pull request #2654 from christianv/CLC-3864b

CLC-3864: Webcasts: change link to iTunes U to "Also available at <link> iTunes U</link>"
Merge pull request #2655 from christianv/CLC-3900

CLC-3900: Additional rules for JSCS
Merge pull request #2656 from raydavis/raywip

CLC-3626 Do not show redundant "Webcasts" header when embedded in Canvas
CLC-3626 Add Course Mediacasts to app maintenance list for bCourses servers