Adding ability to add %special keys to templateContext

#109

This makes it so that index, key, element, event, viewModel, and arguments will be non-observable if they are added to the templateContext. This makes it so that this will be possible (once the index is added to the templateContext):

{{#each items}}
    {{scope.index}}
{{/each}}

fixing nested properties in references scope

#107

Preventing properties that start with "scope" from being read from the templateContext

Things like {{scope1}} are now being read correctly again.

#104

expanding refsScope to be accessible through scope.vars

#103

This:

    <h2>*foo: {{*foo}}</h2>
    <label>
        *foo: <input value:from="*foo" on:input:value:to="*foo">
    </label>

can now be done like this:

    <h2>scope.vars.foo: {{scope.vars.foo}}</h2>
    <label>
        scope.vars.foo: <input value:from="scope.vars.foo" on:input:value:to="scope.vars.foo">
    </label>

Using *foo and {{>*self}} are also deprecated in favor of this new syntax.

{{./}} works correctly as an alias for {{.}}

#54

Fix for v3.3.7, moving a test to only run in dev

An update to v3.3.7, to move a test to only run in dev mode.

Error when setting on an undefined property

#95 Errors when setting a value no a property with an undefined parent, such as scope.set('foo.bar', 'value'); where there is no foo on scope.

Fix the automatic creation of Refs scopes

In Scope.prototype.getRefs(), the ref scope that was created and appended as the parent of the scope chain, when a ref scope didn't already exist, was not actually a scope; it was a Scope.Refs object, which is meant to be the context object for a refs scope and not the Scope itself. This version fixes that creation to make it a Scope object.

This release also contains a cyclic dependency detection script that runs as part of the test process.

Fixing issue with `this` as a context to event bindings

#89

Updating can-stache-key to receive bug fixes

#86