or, and, not helpers; views are callable, inline partials callable, docs improvements

This passes can-component's tests

This re-orgs the docs towards being use-case first:

This also deprecates much of the older ways of doing things:

It adds 3 new helpers:

• or( first, second, third )
• and( first, second, third )
• not( value ) - this is a converter copied from can-stache-converters

It makes views callable and wires up nodelists:

const addressView = stache(`<address>{{this.street}}, {{this.city}}</address>`);

const view = stache(`{{ addressView(street=user1.street city=user1.city) }}`)

It makes inline partials callable too:

        {{< addressView }}
            <address>{{ this.street}}, {{ this.city }}</address>
        {{/ addressView }}
        <h2>{{ this.user1.name }}</h2>
        {{ addressView(user1) }}

These were both done with a new can.isView symbol we put on view renderers to know these functions are special. When we see this, we make sure to pass the nodeList.