New matchers, based on Contract rather than RequestPattern
Update the echo service to be for new samples
Fully functional have_investated matcher (filtering on body, headers, etc)
Merge pull request #134 from thoughtworks/forensics

New RSpec matcher (have_investigated)
Splitting ContractBuilder out from Generator
Generation: save examples
Make Generator a module, move old code to Pacto::Generator::NativeContractGenerator
Infer names and file path
Expand hint file within contracts path