Option for verbose report of passing assertions

[bogdanbranescu]

Currently, the passing tests simply show up in a simple list. A flag (e.g. --verbose) should be provided so that each expected item within the passing test can be inspected. Examples where this is useful:

• test passes under multiple conditions that are discernible from the assertions
• report information can be further used (part of the response, the result of test fixtures, etc)