Forward delete behaves the same as backspace

[ErisDS]

Pressing the delete key on a full keyboard or fn + backspace on a mac keyboard results in the character before being deleted instead of the character afterward.

This behaved as I would expect, deleting forwards in 0.2.1, and changed in 0.2.2

How I reproduced:

• on master (58ffbc8) using broccoli serve to test the demo
• place the cursor between h and 2 on the first line and press delete
• the character h is removed, instead of 2