adds tests for werobot.messages
add tests for to_unicode
writing tests for werobot.reply
Writing more tests
pass tests on py3k
change the way of handler adding on BaseRoBot. Based on @reorx  's pull request.
rename `werobot.test` to `werobot.testing`. Based on @reorx  's pull request.
add logging
update changelog
add session support and FileStorage(untested) #13
writings tests for session
loads/dumps to json in FileStorage
add MongoDBStorage #14
py3k support
remove fallback
tests passes on py3k.
pep8 passed
update requirements
remove codes for fallback handler
add RedisStorage #15