add keyboard events
key down event (non-repeated)
| Parameter | Type | Description |
|---|---|---|
| name | String | unique name of the event |
| keys | String / [String] | array of keys that need to be down for the event to run |
| event | Function | event to run |
key up event (non-repeated)
| Parameter | Type | Description |
|---|---|---|
| name | String | unique name of the event |
| keys | String / [String] | array of keys that need to be down for the event to fire |
| event | Function | event to run |