• Added: RFC5397 - current-user-principal support.
• Fixed: Issue 27: encoding entities in property responses.
• Added: naturalselection script now allows the user to specify a 'minimum
  number of bytes' for deletion. This should reduce load due to less crawling
• Added: Full support for the calendar-query report.
• Added: More unittests.
• Added: Support for complex property deserialization through the static
  ::unserialize() method.
• Added: Support for modifying calendar-component-set
• Fixed: Issue 29: Added TIMEOUT_INFINITE constant