Added a decorator that sets the setup for a specific function test case. Closes #82.
Added documentation for the with_setup decorator.
Added the with_teardown decorator.
Merge pull request #125 from thedrow/topic/decorators

Added decorators that sets the setup & teardown for a specific function test case.
Fixed typo in docstrings.
Bumped version.
Merge branch 'master' into release/0.5.0
Rebased release branch on master.