shows a blank xyplot

unfortunately the preview does not render this!
shows a populated graph
Graph is populated with data from bom

The graph x axis is the wrong way around
it is also quite squishy and hard to read.
Added Javadoc for androidplot
Some formatting changes to the graphs

* values are shown in oldest to most recent order (left to right)
* times are shown on the x axis
* title is set to the name of the station
* legend is no longer visible
no need to create an array
fixed formatting of the x axis (time)

using androidplot to set the number of values on the x-axis (see setDomainBoundaries)
rather than pass through the milliseconds for the times, we just use the index for the series (see  SimpleXYSeries.ArrayFormat.Y_VALS_ONLY) this allows us to then refer to our readingTimes list directly.
wind data can now be read from a local file

This is helpful at the moment when bom is down. Maybe this is something that we have to handle in the future?
data updated with actual data from bom
Small refactor