Added autoLoadStoredToken option that automatically logs in but only if a previously stored token is present in Local Storage.
If autoLogin and autoLoadStoredToken are both set to true, login is only called once and autoLogin has precedence
If onlyLoadToken is true and the token was not found in storage, we need to remove current login attempt
Fixed removed current login attempt code to be called in all cases and use a completer error
Improved error message
Merge pull request #56 from OzzieOrca/autoLoadStoredToken

Auto load stored token