Update readme re importStubs / stubImport

Multivalue header support on stubbed responses

Merge branch 'miguelsimoes-master' (tweak of #10)

Merge pull request #5 from rowanhill/next

Support modern (2.18) WireMock

Minor changes to PHP, but not to supported WireMock API (see PR #2)

Update readme (for 1.43 and equalToJson compare mode)

Update readme for 1.40

Add comment explaining strange exec() redirect hack