Enable to specify multiple times for :at parameter
Fix #8 by setting default array to @@events
accept * as hour, check only the minute when the hour is nil
v0.3.0
Support ruby 1.8.7

On 1.8.7, m[0][1] returns not a char, but a char code.
Use multiple matchers instead of checking twice
Create Gemfile
Introduce Travis-CI
Add default task as test
v0.3.1
Parse string to date in helper methods
Accept "hour" specification with a single letter (like 8 or *). Fixed #2
Add link to clockwork-init.sh

clockwork-init.sh is for creating a heroku project easily.
Add description for :at parameter to README
Fix the pollution of the top-level namespace

Stop to include Clockwork module in bin/clockwork
Merge branch 'no_include'
Version bump to 0.3.2
Regenerate gemspec for version 0.3.2
Add weekly task

add .week derective
accept alphabets for :at, try to interpret them as weekday specification
whitespace
Separate :at parser from Event to At class

ready? predicate becomes easy to read