Make JPM run/xpi work with old school add-ons
Merge remote-tracking branch 'mozilla/master' into old-school

Conflicts:
	lib/task.js
	lib/utils.js
	package.json
Only supporting restartless add-ons at the moment
adding a test, fixing others
Merge pull request #210 from erikvold/old-school

Supporting any restartless add-on for jpm run and jpm xpi