Disable interactive command prompts via site/user config.

Closes #373.
Update -f/--force command option help.
A cleaner way of removing -f from commands that do not prompt.
Merge branch 'master' into 373-command-prompts
Fix the suite events test suite.
Merge pull request #375 from hjoliver/373-command-prompts

Disable interactive command prompts via site/user config.
Merge pull request #396 from hjoliver/test-suite-bug-fix

Fix the suite events test suite.
Merge branch 'master' into 204.suite-env-file