Reimplmented beforeAll and afterAll so it works when running a single test. Fixes #295
Merge pull request #1 from plain-vanilla-games/before-and-after

Reimplemented beforeAll and afterAll so it works when running a single test.
Remove the need for a separate SenTestSuiteRun subclass.
Fix memory leak.
Remove use of -valueForKey:
Merge pull request #2 from InsertWittyName/pnv-beforeafterfixes

Re-implmented beforeAll and afterAll so it works when running a single test