Fix typo
Add examples/sip_client based on examples/echo_client
Renaming contents of sip_client from echo_client
Sending a SIP OPTIONS message
Correct the Via header for WS transport
Fixes for sip_client new 0.3 API
Add README for sip_client
Automatically configure platform via Boost.Config
fixed comment at end of include guard
fixed spelling, including "experimental" in API
Fixed Visual Studio 2012 warnings
Fixed daylight savings time formatting problem on Windows
Merge pull request #253 from breyed/spelling

fixed spelling, including "experimental" in API
adds a machine readable internal error code

To be used for storing detailed error codes for why connections failed
or were closed
adds new error codes for handshake timeouts
add methods to retrieve WebSocket close codes & reasons
set state to closing after we send our close frame
remove unused code
add handshake timer & associated handlers
add handshake timeout handlers
whitespace