Log Message:
Update to version 2.0.6

Changes since last packaged version (2.0.3):
Version 2.0.6 - 7 October 2007
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- Bug fix; the search query that was sent with the select_all() method had an
  incorrect format and this caused an error in some mail servers.

Version 2.0.5 - 4 October 2007
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- Bug fix; an error in the sample extensions file.
- Bug fix; typo errors in the manual page.
- The documentation was updated with details and examples on how to access
  mailboxes inside folders.
- Examples were added on how to define composite filters that include multiple
  searching rules.

Version 2.0.4 - 27 September 2007
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- Bug fix; the send_query() method didn't return the special form of table that
  the rest of the searching methods did.
- An additional searching method has been added to search for keyword flags
  set.
- A new variable that was added to the Makefile makes it possible to set an
  alternative environment for the installation path.