Implement boolean flags.
Implement boolean flags.

Unhappy with where this is going though.

pyinvoke/invoke,kejbaly2/invoke,alex/invoke,pfmoore/invoke,frol/invoke,pfmoore/invoke,mattrobenolt/invoke,mkusz/invoke,mattrobenolt/invoke,kejbaly2/invoke,mkusz/invoke,pyinvoke/invoke,singingwolfboy/invoke,tyewang/invoke,sophacles/invoke,frol/invoke