Implemented bnep extension header parsing
Modified logging level for lots of log messages (log_info -> log_error)

git-svn-id: http://btstack.googlecode.com/svn/trunk@2998 1a0a8af8-31b5-11de-8e0c-53a27eea117e
Implemented bnep connection timeout. Currently set to 10s
Added new event BNEP_EVENT_CHANNEL_TIMEOUT which is emittet as soon
as a the bnep connection establishment times out.

git-svn-id: http://btstack.googlecode.com/svn/trunk@2999 1a0a8af8-31b5-11de-8e0c-53a27eea117e