Capture stdout/stderr that occurs during the execution of a test

[jmvrbanac]

Currently, Specter doesn't capture the output for code that occurs during a test. It would be nice to have the option to suppress it.

This is was it currently looks like (kind of ugly):

          ___
        _/ @@\
    ~- ( \  O/__     Specter
    ~-  \    \__)   ~~~~~~~~~~
    ~-  /     \     Keeping the Bogeyman away from your code!
    ~- /      _\
       ~~~~~~~~~

Some actions Actions
  ∟ should not contain duplicates
(None, None)
GOT HERE!
  ∟ can disconnect