Merged devel-addressbook back to trunk

Hi everybody,

I just merged the devel-addressbook branch back to trunk and committed it with revision 543. LDAP servers now fully integrate in the address book as additional sources. This merge also introduces some changes in template parsing and the way, a step script sends its data back to browser. There is a new class 'rcmail_template' which handles the template parsing as well as AJAX responses. It should also improve the quoting of HTML and javascript strings.

Testers (and everybody else) are requested to get the latest SVN checkout and test heavily. I will also do a lot of testing in the next couple of days.

Regards, Thomas

P.S. I've set a release date for 0.1-rc1. Help me to get everything done by then!