adding a few missing contributors

Hello everyone, This is a proposal to add a few missing names to the contributors list within the manuals preface*. If you object or would like to comment and/or change this list, please say so now. Pierre-Alain Joye - image, zip, filter, and enchant

 Etienne Kneuss    - bugs, commits, and backend

Hannes Magnusson - mostly backend, but docs too

 Rob Richards      - dom and xmlreader

Masahiro Takagi - follows and fixes all commits Michael Wallner - ref.http http://www.php.net/manual/preface.php#contributors I think the contributions speak for themselves. Long ago we decided to not have an exact science for this so for example whether Mike is added can be debated as he essentially wrote just one extension but it (ref.http) is quite large and its creation introduced the basic framework for future OOP extensions. If there are no objections I'll add these names later this week. Regards, Philip Olson