adding other modules for tests in the cabal file.
adding FdCacheSpec
removing unnecessary empty lines.
adding forkIOwithBreakableForever and breakForever.
removing TimeoutManagerStopped
Merge pull request #185 from yesodweb/breakable-forever

Breakable forever
Defining an exception: BreakForever.
Merge branch 'wai2' into wai2-no-conduit