appstate: reconnect on SessionExpiredError
depends on kazoo.yandex
Merge pull request #27 from mdevaev/kazoo-dep

depends on kazoo.yandex
reraise SessionExpiredError
Some exceptions handling
appstate: ignore exceptions in zoo.close()
appstate: catch all exceptions, not only zoo.SessionExpiredError
Merge pull request #26 from mdevaev/appstate-expired

appstate: reconnect on SessionExpiredError