Documentation update

working_with_textures page (and another update to commands.js which adds a shortcut for all 4 arrows surrounded by parenthesis).

Also, I couldn't figure out how to upload the images that are used in this page.. so here they are:

[faceTab_top.png](https://f.cloud.github.com/assets/1986021/168759/0d6eea74-7a08-11e2-94c7-cbec44a86e61.png)
[faceTab_bot.png](https://f.cloud.github.com/assets/1986021/168760/103f6e68-7a08-11e2-8a88-c4abbf7dc030.png)
[textureAlignmentShortcuts.png](https://f.cloud.github.com/assets/1986021/168764/2c96569e-7a08-11e2-87cb-9db8d3570eb2.png)