Merge pull request #37 from hucongquan/2.0.16

OnFail not set will throw NullReferenceException

Merge pull request #29 from kuzzh/2.0.16

Send cookies set in header

Merge pull request #27 from daixian/2.0.16

Pass the HttpWebRequest out when it is ready to work

Merge pull request #24 from daixian/2.0.16

Replace "\n" with "\r\n"

fix readme again

readme updated

serialisation exception introduced for #19

update readme

Bugfix 17 allowing submission of DELETE/POST/PUT methods without body

Merge branch 'HttpLib-16' into 2.0.13