Some internal API changes; resolves #15 making panes toggleable via buttons; see the demo's bottom-most hidden pane for example.
Resolves #8 (mostly) with a data-tulito-panegap="full" that allows hidden panes to be full screen, and an example of scrollable cards via the bottom pane. Even with its shortcomings, this is probably the best card pattern for this project. Also added index.less to try and manage some of the complexity creeping in to index.css. Needs quite a bit of cleanup. Also resolving #5 because I've decided the way to resolve iscroll snapping is to provide strict scrollable width with an snapStep parameter.