Some changes

I made a few changes that are useful for my office.  I thought it would worth sharing, please let me know what you think!

Summary of changes:
* backend changes
  * added a make uninstall target for easier deployment / undeployment
  * added adLdap PHP library to support LDAP authentications (like Active Directory)
  * moved all settings into beacon.conf (php settings file reads it in)
  * created a configure script to populate beacon.conf settings (from beacon.conf.sample and httpd-beacon.conf.sample)
  * improved handling of special characters throughout (filename, editor, XML, HTML, etc)
* docbook changes
  * added support for the Xref tag as well as a dialog box to select the linkend
  * added support for orderedlist
* ui changes
  * added dual-selection-highlighting feature between the HTML preview and the Node Tree (selecting a node on either side highlights it on both sides)
  * replaced Document Tree & Inline Editor accordion with tabs (this is essential because the tree pushed the accordion too far down).
  * added feature of selecting which XML template to start with
  * replaced jGrowl with jQuery UI dialog wrapper
  * replaced confirm popup on close with a jQuery UI dialog box
  * added indenting and more styles to docbook HTML view, creates a better distinction between sections, etc.