Renamed :pass_actual, :fail_actual to :pass_with_actual, :fail_with_actual

- incremented version to 0.0.2
- current spec status: 44 examples, 0 failures
Added :have_accessor matcher

- incremented version to 0.1.0
- current spec status: 51 examples, 0 failures
Added :have_mutator core matcher

- incremented version to 0.1.1
- current spec status: 58 examples, 0 failures
Added :include_matching matcher

- Added missing docs for :have_mutator matcher
- Incremented version to 0.1.2
- Current spec status: 62 examples, 0 failures
Added tweak to built-in :be_kind_of matcher

- incremented version to 0.2.0
- current spec status: 71 examples, 0 failures
Added changes to built-in :respond_to matcher

- incremented version to 0.2.1
- current spec status: 116 examples, 0 failures
Added missing documentation for built-in :respond_to matcher