[issue #87] Kill vm.runInNewContext with fire

Change default condition evaluation from vm.runInNewContext to
eval-style functions.  Use of "naked" variables (pid === 123, etc) no
longer works, making this.<name> variable qualification necessary.
[minor] fix jsstyle issues in example
Merge pull request #154 from pfmooney/GH-87

Fix #87 - nuke vm.runInNewContext condition filtering