Use Data.Pool for connection pooling.
Fixed 'unused' warnings.
Separate session creation timeout from connection timeout.
Add IO timeouts to frame read/write.
Add simple pool test.
Export API to get basic server stats.
bump cabal version to 0.4.1.0
use hslogger rather than trace to log useful debug info
export newPool' which allows overriding pool configuration defaults
ensure round-trip precision up to milliseconds for UTCTime columns
Merge pull request #9 from wrl31415926536/master

Use Data.Pool for connection pooling