Table: add setRowsSynced method

[buschtoens]

Fixes #414.

The tests assert that:

• the table is initialized with a synced array
• the synced array may be replaced
• the replacement array is correctly synced
• mutating the replaced array has no effect

[buschtoens]

While we're at it: do the row mutation methods (addRow, insertRowAt, removeRow, ...) all work as intended when { enableSync: true } or (if not) are they intended to do so? Should they delegate to the proxied array or throw?

– #414 (comment)

Fun fact: they delegate to the synced array. It may be noteworthy that setRows does not destroy or replace the binding. Instead the synced array's elements are replaced with the given rows.

[alexander-alvarez]

slightly tangential question: you wouldn't happen to know if there's any downside to https://github.com/buschtoens/ember-light-table/blob/master/addon/classes/Table.js#L155 doesn't pass in the options to Table.createRows()

[buschtoens]

Shoot, I forgot to update the @method tag.

Good question... We could add options.rowOptions in the constructor and pass that. If users require options to be passed right now, they should be able to wrap in Table.createRows(rows, options) methinks.