Set frames x y

I often create frames with `CGRectMake` but when I want to break them out into left, top, width, height in the easy attributes setter, i always screw up and do x/y instead of left/top. This makes it so you can use either way.... or both!

left/top
---
```ruby
@dummy.set_easy_attributes @parent, @child, {
  left: 10,
  top: 20,
  width: 100,
  height: 50
}
```

x/y
---
```ruby
@dummy.set_easy_attributes @parent, @child, {
  x: 10,
  y: 20,
  width: 100,
  height: 50
}
```

variety is the spice of life!
---
```ruby
@dummy.set_easy_attributes @parent, @child, {
  left: 10,
  y: 20,
  width: 100,
  height: 50
}
```



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