add tests to sdist

Add the test suite to the sdist so that packagers and people who like to
verify they have their environment setup correctly can run the tests.
implementing support to regex match against exception messages. closes #70
Merge branch 'master' of github.com:gabrielfalcao/sure
Merge pull request #66 from alunduil/add-tests-to-sdist

add tests to sdist
removing curdling from build
Merge branch 'master' of github.com:gabrielfalcao/sure
updating release script
New release: 1.2.8
add steadymark as requirement

steadymark is used for testing