Added new command line option
First pass using header matching parameter
Added stub mapping recording test for headers
Added acceptance test for matching headers
Merge branch 'header-matching-option' of github.com:jvergeldedios/wiremock into jvergeldedios-header-matching-option
Removed recording header matching parameters from Admin interface (now passed straight from Options into StubMappingsJsonRecorder constructor). Removed need for separate boolean for enabling request header recording. Made header matching case insensitive.