Hide Route header when sending requests out

Ignore-this: 75c9b765903ac7a169870df1e5a3a6b0

darcs-hash:20100608055748-56b4d-af4e256ebb1073c877ef6cb2f50770e2a0c329e9
Improve documentation about audio device sharing

darcs-hash:20100612090929-58252-13418a7e5c3e537cf92f9e028a4232f25dabdb1c