sf add option to never run multiple files at once. Ask user which files to run when running them all doesn't make sense.
Merge remote-tracking branch 'sean/AddInteractiveTestSolution'

Conflicts:
	lib/sfb_scripts/test_running/test_runner.rb
Add version file
Bump to 1.7.0
Create db and migrate separately, for engines
Bump to 1.7.1
Add --reset option to drop dbs
Bump to 1.8.0