* allow multiple definitions for headers "Set-Cookie" and "Link". Fix apiaryio/snowcrash#75
* move headers definitions into HTTP.cc && HTTP.h
* fix comment
* add test hedars against parsed values
fixed test case tag due to apiary policy
Merge pull request #229 from klokane/klokane/issue75-multiple-header-definitions

* allow multiple definitions for headers "Set-Cookie" and "Link". Fixes #75