Upgraded Unity project to Unity 5.0

NLog.Unity: Added DontDestroyOnLoad to NLogConfig

NLog.Unity: Added [DisallowMultipleComponent] to NLogConfig

Added TimestampFormatter

Removing appender from LoggerFactory affects all existing logger inst…

…ances, too.

LoggerFactory adds new appender to all existing logger instances

Fixed: server accepts connections from any ip address

Works with Unity now