Clean up app.start tests
Raise on unknown dependencies for deps.get and deps.update
Ensure File.cp_r/3 respects trailing / in sources
Exception.stracktraces now format anonymous functions more readably.
reformat and colorize stack traces in iex
Work through José's suggestions
Merge branch 'format-fn-in-stacktrace' of github.com:pragdave/elixir into format-fn-in-stacktrace

Conflicts:
	lib/elixir/lib/exception.ex
	lib/iex/lib/iex/evaluator.ex