merged v0.9.1
moved doc/demo.md content to README.md
refactored functional tests
changed verification to include invocations before when
tested verification of call inside when
deleted Will and used Handler instead
tested stubbing invocation
removed unnecessary final keywords in Testory
refactored by replacing on(Object, Invocation) with proxyWrapping(T, Typing, Handler)
implemented stubbing with custom logic for matching invocation
implemented verification with custom logic
added missing message assertion in verification test
formatted table of contents in tutorial.md
implemented capturing for stubbing and verification
implemented verifying number of invocations
documented comparing of arrays