* updated _check_root to just change the handle and password of the existing master account rather than created a new one
	* javascript create_login changed to be called on the app, and also removed defunct register_login method (called from javascript).
	* removed EMAIL and HANDLE cache vars from Yote::YoteRoot. These were buggy, given the threaded nature of Yote. This also revealed a bug in the hash function of mongo db. It was not escaping the periods in the keys properly.
	* added a Yote::SimpleTemplate class with a _fill method
	* added mail configuration options
	* account can be created on mail now
	* added mutexes in YoteRoot. These are just empty yote objects with their _lock and _unlock called at appropriate times.
	* updated tests