Update dygraph-combined.js to v1.0.1.

From http://dygraphs.com/1.0.1/dygraph-combined.js on 2014/05/19.

Change-Id: I07ccc59c0e464425fd1b0e5a4407025af453ec7e
Implement chart=traces.

This is intended to work something like logic analyzer traces, where each
series is shown on a separate line chart, all vertically stacked, with
synchronized X axis but each with its own Y axis (since each series may have
completely different units).  As you mouse over, there's a crosshairs for
each chart that highlights the same X-point in each series.

Example chart using one of the sample datasets:
http://localhost:1111/?url=example2.json&pivot=date;state&chart=traces

Right now, it assumes the first column of the input data is X (probably
datetimes) and each subsequent column is the value series for one of the
graphs.  This will probably evolve a bit to support multiple series per
chart, but I'm still playing with that.

Change-Id: I6e09661a24c93df0da6094a3f751fe8406087196