Add t::Util.
Modify .gitignore.
Reformat *.t files.
Merge pull request #5 from NetPenguin/refactoring-test-case

Refactoring Testcases.
Add testcase for detecting memory leaks.
Add testcase.
Fix circular reference.

Remove a `mock` property from `Expectations`.
Update Changes.
revert cpanfile update
Merge pull request #6 from NetPenguin/fix-circular-reference

Fix circular reference
Merge remote-tracking branch 'origin/master' into feature/support-class-method-mocked