Version 0.2.0

IMPROVEMENTS:

• Use redis.v3 package (@vially, #2).
• Added a new CHANGELOG.md, in addition to some minor updates to README.md.

Version 0.1.1

FEATURES:

• Example middleware for Negroni
  (@vially, #1).

BUGS:

• Fix off-by-one error on the max number of attempts per period (@vially, #3).

v0.1.0: Initial release

Attempt to fix weird wercker bug