Further tweak version of continuations plugin in scala-dist.pom

While we must use full version, rather than the cross version
(12720e699), we need to use latest non-snapshot version.

This should avoid failures like:

  https://jenkins.scala-ide.org:8496/jenkins/view/Scala%20Xsource%20flag%20nightlies/job/Akka/63/console

Such as:

	[warn] ::::::::::::::::::::::::::::::::::::::::::::::
	[warn] ::          UNRESOLVED DEPENDENCIES         ::
	[warn] ::::::::::::::::::::::::::::::::::::::::::::::
	[warn] :: org.scala-lang.plugins#scala-continuations-plugin_2.11.0-SNAPSHOT;1.0.1:
	not found
	[warn] ::::::::::::::::::::::::::::::::::::::::::::::
	sbt.ResolveException: unresolved dependency:
	org.scala-lang.plugins#scala-continuations-plugin_2.11.0-SNAPSHOT;1.0.1:
Merge pull request #3672 from retronym/topic/binary-version

Further tweak version of continuations plugin in scala-dist.pom
SI-8460 Refactor typedImplicit, DivergentImplicitTypeError

Organize things so that Context.openImplicits contains the full implicit
search path in the places where we create DivergentImplicitTypeError,
and capture that stack in the error. It contains all the information
we need to produce the current error message.

A subsequent commit will use this stack to improve the diagnostic message.
SI-8454 Improve diagnostic for diverging implicits

Show the the stack of nested implicit searches.
WIP SI-8460 A failing test case

Extracted from shapeless