add a syslog logger
Merge pull request #23 from docmunch/master

expose monad-logger log formatter
Merge pull request #24 from docmunch/syslog

Syslog
Using ByteString builder when available.
Add a lower-bound on unix-time

Fixes #22.
Merge pull request #25 from CodeBlock/patch-1

Add a lower-bound on unix-time
clean up the code.
refactoring.
refactoring.
refactoring.
stopping exporting nunnecessary funcs.