refactor(ionicBar): fix controller being assigned to parent scope
refactor(ionContent): remove has-* classes

BREAKING CHANGE: ion-content's has-header/footer/tabs attributes
no longer work.

Use the classes 'has-header', 'has-subheader', 'has-footer', and
'has-tabs' to modify the positioning of the ion-content relative
to surrounding elements.

Before: `<ion-content has-header="true">`

After: `<ion-content class="has-header">`
chore: remove animation & type attributes, standard controller names