New logging system for multicore IO manager of GHC 7.8.
deleting Date.

FIXME: We need to support Windows.
New logger system for multicore IO manager of GHC 7.8.
renaming modules.
fixing tests.
hiding unnecessary modules.
exporting FileLogSpec.
updating doc.
proper type.
doc update.
withStdoutLogger.
losing type.
withStdoutLogger flushes on termination.
doc update.
updating doc.
removing warning.
Supporting Windows.
Using atomicModifyIORef'.
closed import.
closed imports.