Add a link to the fake_mockups folder
Start ignoring .DS_Store files
Add optional options param to the FileSystemInterface initializer (it helps with integration)
Add CliParser class to handle command line arguments; update the .start_up method to use the new arguments
Update readme with directions for serving files from a github repo
Merge pull request #2 from VersaHQ/iss-1

Add command line arguments to potatochop.