Correct time while setting Quiet Time.

Avoiding to set the year in NSDateComponents results in time being adjusted pre-PST.
Example: Setting the quiet time start to 06:00 actually gives 05:54:14 for me.
See: http://stackoverflow.com/questions/13596358/setting-nsdatecomponents-results-in-incorrect-nsdate
Add autorelease to NSDateComponents while setting Quiet Time.
Merge pull request #37 from valpolushkin/patch-1

Correct time while setting Quiet Time.