Log error stack trace (PhantomJS/SlimerJS)

[immoh]

This PR modifies this output

;; ======================================================================
;; Testing with Phantom:

ReferenceError: Can't find variable: Map

  phantomjs:https://code/phantom8526881425544510795.js:81 in onError
Subprocess failed

to include stack trace

;; ======================================================================
;; Testing with Phantom:

ReferenceError: Can't find variable: Map

  phantomjs:https://code/phantom5344940102494846597.js:81 in onError
  file:https:///Users/iheikkinen/src/foobar/target/out/cljsjs/react-dom/development/react-dom.inc.js:6075
  file:https:///Users/iheikkinen/src/foobar/target/out/cljsjs/react-dom/development/react-dom.inc.js:15
Subprocess failed

so that troubleshooting is a bit easier.

[miikka]

Nice, thanks!

[miikka]

I figured out that it's a good time to create a release, so this is in [lein-doo "0.1.11"].