Fix CSS so that secondary toolbars in popup toolbars drop down directly below their parent icons.
Move CSS and example toolbar into Leaflet.draw and refactor examples accordingly.  Work on developing L.ColorPicker as an example of the capabilities of the new toolbar plugin.
Tweak toolbar behavior in response to developing L.ColorPicker.
Add test to make sure that arguments called with Toolbar#addTo are passed to each toolbar action factory.
Tweak coverage/build badges in README.md.
Add minification task at the end of build (minify using uglify-js).
Bring L.ToolbarIcon into L.ToolbarHandler.
Show color swatch in toolbar icon under examples/popup.html.
Remove the toolbar once a color has been picked.
Ensure that only one action in a toolbar can be active at a time.
Change the format of a toolbar specification so that toolbars are specified as an array of constructors rather than an array of functions, each returning a constructor.
Tweak example so that toolbars in example are specified by passing an array of constructors.
Fix tests to work with toolbars-as-arrays-of-constructors.
Rename L.ToolbarHandler to L.ToolbarAction and remove dependency on L.Handler (L.Handler assumes unecessarily that every handler will be passed a map - not necessarily true for toolbar actions).
Fix issue with L.ToolbarAction where action could not be re-enabled after it had been once used (the issue was with code in L.ToolbarAction#enable that disabled the action currently active on the toolba).
Refactor examples/popup.html to make color picker code more readable.
Move code ensuring that there is only one action active at a time from ToolbarAction to Toolbar.
Change ToolbarHandler to ToolbarAction in Gruntfile.