Apply Chris Lambacher's first set of patches: - ISAPISImpleHandler creates handler object per request. - ISAPIThreadPoolHandler where the wsgi requests are run on worker threads from the thread pool. - removed apps dictionary so app now serves from VirtualDirectory root. 
Apply Chris Lambacher's first set of patches:
- ISAPISImpleHandler creates handler object per request.
- ISAPIThreadPoolHandler where the wsgi requests are run on worker threads from the thread pool.
- removed apps dictionary so app now serves from VirtualDirectory root. 


git-svn-id: 7e822a89a176b6c85b47b7c864bb3d34c9b59148@23 926716e8-761c-0410-85d1-e31c6663a17e

ig0774/isapi_wsgi