Updated notes
- Add event hooks for map loading/loaded
- Add empty FusionLegendTree that derives from dijit.Tree which will contain our Fusion-specific modifications. Right now this functions the same as a normal dijit.Tree
Implement the Navigator widget. This is mostly a surgical graft of the current fusion one, with the MooTools-specific stuff disabled until we can re-implement with equivalent dojo functionality, or worse-case we bite the bullet and look to see if we can get an AMD-compatible MooTools with only the bits we're after.

Also with this change, we've introduced a special path for widget assets. Fusion.getAssetPathForWidget() will generate the path for a widget asset.
README.md and template updates
- Add empty SelectionSet class
- Fix cursorposition displaying NaNs due to the LoadMap/LoadScaleRanges response restructuring
- Add AMD-ified copy of proj4js. This is currently just the library itself and not the whole set of definitions in csmap2proj4.js
Finish implementation of EditableScale widget