Made rspec tests pass

I've made the assumption here that the behaviour of nickel has changed since these tests were written?

1. Replaced Nickel.query with Nickel.parse
2. Replaced '.start_date.should == "20091015"' with '.start_date.date.should == "20091015"' (called .date() before comparing to string)
3. Replaced '.start_time.should == "11:00:00"' with '.start_time.time.should == "110000"' (called .time() before comparing to string and changed time to a numeric value)
4. Replaced '.day_of_week.should == "tues"' with 'day_of_week.should == 1' (replaced day of week abbreviated form with numeric value)
Updated the readme to show 'day_of_week' to be a numeric value, not an abbreviated string