using 'bail' to bail tests per suite, not full test run
add a new option paramter for bailing the suite to make previous change backwards compatible
fix failing tests
rename option paramter to -bs, --bailSuite
add test for bailSuite option
Merge remote-tracking branch 'origin/bail-suite'

Conflicts:
	bin/_mocha
	lib/mocha.js
	lib/runner.js
	lib/suite.js