Unzoom plug-in, rev 1.
Add plugins option to Dygraphs. Add demo-test. Add test.
Add new test to misc/local.html
Fix responsese to code review 194.
Took a while to get conditional show to work; works in the case where you zoom in on a graph using the mouse, and don't have the mouseover event since you're already over.
Merge branch 'master' into unzoom
Code review comments.
Last set of code review comments for unzoom.
Merge pull request #194 from kberg/unzoom

Fix issue http://code.google.com/p/dygraphs/issues/detail?id=58 using plug-ins
Range selector is now a plugin

Conflicts:

	dygraph-combined.js
Moved check for labels existence into reparseSeries since that method is also called by Dygraph.updateOptions()
Need to call createDragInterface_() after plugins are activated in order to allow a plugin to change the default interactionModel.
Changes based on comments from pull request
More range selector auto tests
Handling zoom handle left position as a floating-point number for better accuracy at the extremes.
lint checks mostly pass
nearly all lint errors gone; closure compiler still happy
wrap DygraphOptions
remove unused opt
add note about http-equiv being first in the head section