Added helper that can be used for simple tables

[taras]

This PR adds a helper that makes it possible to render a table without writing any JavaScript. It's very limited in it's functionality but it can be expanded in the future with some secret sauce.

To use,

{{light-table (table columns (get data '[]'))}}

TODO

• Created table helper
• Added simple unit test for test helper
• Added integration test to show helper working
• Documentation

[offirgolan]

@taras I think we can released this now that enableSync has been released.

{{light-table (table columns (get data '[]') enableSync=true)}}

[offirgolan]

I think this is a pretty dangerous route since every time the helper will recompute, it will create a new table instance which will reset the table's entire state. That can be pretty hellish to debug....

Proposed Change

{{light-table (table columns (get data '[]') enableSync=true)}}

export default Ember.Helper.extend({
  table: null,

  compute([columns = [], data = []], hash) {
    let table = this.get('table');
    
    if (!table) { 
      table = new Table(columns, data, hash);
      this.set('table', table);
      return table;
    }
    
    // We still lose the column's state here
    // Maybe we can do a diff here to see what changed? 
    table.setColumns(columns);
    table.setRows(data);

    return table;
  }
});