Updating dygraph to 1.0.1

Sources: http://dygraphs.com/1.0.0/dygraph-combined.js and
http://dygraphs.com/1.0.1/dygraph-combined.js

Note: 1.2 predates 1.0.0, package.json updated appropriately
Merge pull request #2506 from petecooper/master

Updating dygraph to 1.0.1