Changes to 0.9.1 from 0.9.0
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- fixed installation bug where file system permissions would prevent creation of 'guestbook.db'
- if the admin deleted a post while someone else submitted a post, the numbering schemes got mixed up.
  This resulted in the wrong post being deleted. Now no post is deleted for safety reasons.
- added a "color" section to the color selector, because the topmost color did not trigger the script
- special characters such as quotes no longer are preceded by a backslash