Added code to pass a token with a set expiration date from the client.
Added token check on the server side.
Added time sync with the server for token generation.
Expiration is now optional. If auth is set to a number, that is the number of seconds the token is valid for.
Better check for options.auth being a number.
Check to see if we have Buffer() available on the server side.
New check to make sure we have the token.
Switched Metheor.method to HTTP.methods for the getServerTime() function.
Switched to HTTP.call() to get the server time
Merge pull request #1 from tanis2000/master

Support for expiration token