Fix the problem that parsing a date string fails

I encountered a problem where Recording.getDateCreated() returns null, and found that parsing a date string was failing in the method.

Then I found this:
http://stackoverflow.com/questions/2458524/parsing-rfc-2822-date-in-java
In my environment, java.util.Locale.getDefault() returns "ja_JP".

By adding Locale.English to the SimpleDateFormat constructor, SimpleDateFormat.parse worked fine for me, too.

Thanks.