Add verbose mode
Add verbose mode

Closes #51.

jcpeterson/Dallinger,berkeley-cocosci/Wallace,jcpeterson/Dallinger,jcpeterson/Dallinger,Dallinger/Dallinger,jcpeterson/Dallinger,jcpeterson/Dallinger,berkeley-cocosci/Wallace,suchow/Wallace,berkeley-cocosci/Wallace,suchow/Wallace,Dallinger/Dallinger,suchow/Wallace,Dallinger/Dallinger,Dallinger/Dallinger,Dallinger/Dallinger