Add Inch badge to README

[ci skip]
Release 0.2.0
Update docs badge in README

Update the URL of the docs badge to include it from inch-ci.org instead of inch-pages.github.io (the former being the successor of the Inch Pages project).

[ci skip]
Merge pull request #19 from rrrene/patch-1

Update docs badge in README
do not declare classes when they do not exist
Merge pull request #21 from grosser/grosser/eval

do not declare classes when they do not exist
Release v0.3.0
Use cucumber to run integration tests from RSpec
Run features on Travis
Fix `assert_include`
Update around_spec.feature

See https://raw.githubusercontent.com/rspec/rspec-core/c46827984825e9596405658621d8ecfe8ecdf5ff/features/hooks/around_hooks.feature
Swallow arguments passed to around in spec

Try to imitate RSpec's `around(:example)`.
Modify RSpec feature to pass MT's specs
Mark problematic/incompatible features
Let most RSpec features pass