add ACKNOWLEDGEMENTS file to list past and present contributors

From derek.br...@gmail.com on February 12, 2009 16:40:13

We should add an ACKNOWLEDGEMENTS file to list past and present contributors. Though the past VMware, Determina, MIT, and HP developers do not have any copyright ownership anymore we should still acknowledge their contributions.

Original issue: http://code.google.com/p/dynamorio/issues/detail?id=7