d2l-grid component

[awikkerink]

Requirements:

• Paging
• Sorting
• Selection (Maybe use https://elements.polymer-project.org/elements/iron-selector?active=Polymer.IronMultiSelectableBehavior)
• page-change, page-size-change, d2l-table-col-sort events

<d2l-grid type="data|list|nolines" has-selection multi page-size="1" page-num="1" on-sort="" on-page-change="" on-page-size-change="">
<d2l-grid-actions>
                <d2l-grid-action visible="{}">
                </d2l-grid-action>
            </d2l-grid-actions>
            <table>
                    <tr is="d2l-grid-row" selected visible="{}">
                        <td></td>
                        <td></td>
                    </tr>
            </table>
</d2l-grid>