BUG: __sub__ added instead of removed - fixes 26
Merge pull request #28 from dnmiller/subtract-bugfix

BUG: __sub__ adds instead of removes - fixes #26
ENH: more pep8 compliance
Merge pull request #29 from dnmiller/more-pep8

ENH: full pep8 compliance
Merge branch 'master' into numpy-support

Conflicts:
	vincent/vincent.py