Adjusted request headers to be type safe
Adjusted documentation for HttpMethod
Merge pull request #159 from varon/master

Minor touchups
Merge pull request #162 from varon/typesafe_http_request_headers

Adjusted request headers to be type safe
Merge branch 'master' of github.com:suaveio/suave into typesafe_http_request_headers
Enhanced documentation of HttpMethod type
Merge pull request #166 from varon/typesafe_http_request_headers

Documentation for HttpMethods
[Http] +bind complementary method to (>>=)
remove warnings