- Cache Duration was being set to "0" in all cases. Added "Cache Duration" configuration option.
 - Fixed bug introducted with "reset block defaults" feature.
 - Fixed name of reset blcok defaults function

Features:
 - Cache Duration configuration
 - Cleaned up debug mode outputs
 - Timing information added to debug mode

Minor:
 - Added to description in admin page for calendar ID and private ID

feature: ability to enter the XML address for Calendar ID and Private ID and have just the ID be parsed out of it.

scripts

uses google calendar XML feeds as a source. SimplePie is required to parse the XML
feeds.