* camel/camel-types.h: New header with the typedefs for all camel
classes. Now the class headers can just include this and the
header for the parent type. This makes it possible for
CamelService to include a CamelSession without creating an
#include loop.
* camel/*:
* composer/e-msg-composer-attachment-bar.h:
* mail/folder-browser.c:
* mail/message-list.c: frob #includes to match the new reality
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