getIntradayTimeSeries method missing support for

[bwyan86]

Hello.

Thank You for this fantastic library, which has been very useful to me.

Although I am fairly familiar with the code within this library and would properly be able to contribute to the project directly myself, I am - unfortunately - very unfamiliar with the workflow of git and so, I am hoping that I could ask someone here to take a look at this on my behalf?

It seems to me that the getIntradayTimeSeries method does not currently support the input parameter defining the granularity of the data returned (i.e. the "detail-level" parameter): https://wiki.fitbit.com/display/API/API-Get-Intraday-Time-Series.

Is this something that anyone would be willing to try an implement?