Diagonal lasers

Old
![1old](https://f.cloud.github.com/assets/4674335/1958687/b7108e60-821e-11e3-84cf-d86bb1fa3813.png)

New
![1new](https://f.cloud.github.com/assets/4674335/1958690/bb27b3a2-821e-11e3-8ec0-eca8686a653d.png)

Old
![2old](https://f.cloud.github.com/assets/4674335/1958693/c00d05d4-821e-11e3-9366-9b580a2e7293.png)

New
![2new](https://f.cloud.github.com/assets/4674335/1958696/c3f9e2a2-821e-11e3-93ae-0aa0532e3641.png)

Laser/heavy laser/pulse laser done. In hindsight I should have remade them to connect at the edges.