Only use TestAdapter in example groups that need it.
Fix editing for included methods in MRI.

Closes #26.
Fix describing of unnamed module iclasses.

Closes #27.
Closes #28.
Update changelog.
Support latest RSpec.
Implement real_module for JRuby.

Fixes description of iclasses for unnamed modules.
Bump to version 2.1.1.
Gem version badge.
Make looksee#ls method worked together with pry 0.10.1 ls command.