Make response headers available to the code generator
Merge pull request #781 from martoe/responseheaders

Make response headers available to the code generator
test clean-up
removed pretty print
moved jackson-swagger-module into swagger-core
formatting
removed properties to properly add new
updated for order
updated ordering
Use an own version number for this fork
Failing unittests (Windows) ignored
Implemented vendor-specific fields at Operation and Parameter level
Error handling improved