Turn off the Expect header

Turn off the Expect header to stop HTTP 100 Continue responses.
Response parsing was not handling these headers.
added: verious missing php docs ? (strictly not needed of cause but nice to have)
added: fix for  HTTP ....100 Continue
added: getHeader
Merge pull request #1 from fanno/fix_continue

fix for HTTP ....100 Continue
added getHeader()
added various missing php docs
PhpDoc repaired to be in accordance with the interfaces.
New lines added at the end of files.