Multiapi convivence support

AutoProxy and ApiConfig new objects definition. Added "namespace"
property to each proxy library.
One unique AutoProxy instance is created per domain. AutoProxy is a
collection of ApiConfig instances. Each proxy library load register an
instance of ApiConfig into the global AutoProxy object where the key
will be the namespace. Everytime a proxy is created, this will grab
automatically the configuration to use based on its namespace.
Multiapi convivence support by prototype pattern

Multiapi convivence support by prototype pattern. Refactor on
configuration structure.
Update .gitignore
Removed useless "config" parameter from proxies constructor
Final version of multiapi convivence implementation
Cleaning trunk