updated api methods

`content` ~> `template`
better class name prefixing
create full/box template
`[data-action]` as `<thing>:<value>:<option>`
bug fixes
basic “clear” works
trigger methods with event context
`fetch` & `update` methods added
`append` & `expend` methods added
removed `ready` method in place of `ui.on('start')`
demos + docs + base stylings updated
version bump (0.5.0) and some docs