= site: add links to webinar video
! io: prevent `Terminated` dead letters from IO layer, fixes #704

The breaking nature of this commit comes from the `ConnectionHandler::baseEventPipeline` receiving an additional `tcpConnection: ActorRef` parameter.
= docs: add links from directive usages in examples to docs, fixes #703

Two components:
 * client-side javascript which adds the links
 * build-component that tries to extract the set of directives a source
   file defines

The extraction works by a heuristic regexp that tries to distinguish directive
definitions against other definitions. Directives can explicitly be marked
as such by prefixing them with a block comment, `/* directive */`.
Merge pull request #705 from spray/ticket/704

! io: prevent `Terminated` dead letters from IO layer, fixes #704
Merge pull request #706 from jrudolph/w/link-directive-in-code-snippets

= docs: add links from directive usages in examples to docs, fixes #703
= docs: disable directive links for old milestone releases, refs #703
wip