Add option to auto/manual refresh token

- Fixed a typo
- Sometimes the auto-refresh makes no sense if time between requests is very long.
For example if token lifetime is 10 mins and the requests are from hour to hour, some generated tokens will not be used at all.
The noRefresh param was added to initialize_token (API is not broken).
Calling client.initialize_token(cnk, true) will not set a timer.
- Added option to directll call translate (or similar) without worrying about acces token.
I can see the need and I think it is a great idea. Im wondering if it would be easier to specify the `auto` option when creating an instance of `MsTranslator` instead of on each function call? Perhaps as an options object, where auto is just the first option. What do you think?