For copy/paste support in our code samples, we are using the
ZeroClipboard library which relies heavily on Flash.
Because many browsers/extensions are disabling this plugin nowadays,
this commit replaces ZeroClipboard with a native, lightweight solution
for this feature.
This change adds a new "Related Courseware" section in the side
container; this section lists links to courses and talks that are
relevant to the current project page.
Relevant content is fetched by the browser, with an AJAX request sent to
the Pivotal Education LMS API. This API uses the Referrer HTTP header as
input parameter to its content selection algorithm.
Note that CORS HTTP headers are also used to allow/disallow AJAX cross
domain requests.
