GitHub seems to like this name better
Fix whitespace issues
Fix bug if "spread" is called before "bid" or "ask"

Need test case?
Acknowledged new contributor in copyright notices
Test case to check for bug where 'spread' is called before 'bid' or 'ask'
No need to include contact information in every file
Moved all 'spread' tests to be together
Bumped version number
Merge branch 'release-0.1.1'