Add direct link to event chart image

This adds a direct link to the event chart image
so that the full-resolution image can be "zoomed"
in to.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

docs/reference/api/docker_remote_api.md

@@ -94,7 +94,7 @@ wget --no-check-certificate --certificate=$DOCKER_CERT_PATH/cert.pem \
 
 The following diagram depicts the container states accessible through the API.
 
-![States](images/event_state.png)
+[![States](images/event_state.png)](../images/event_state.png)
 
 Some container-related events are not affected by container state, so they are not included in this diagram. These events are: