Merge pull request #50 from bvssvni/master

Upgraded to latest Rust + Rust-Empty
Implement immutable and mutable pixel iterators.
Implement an image trait to allow generic access to images.
Provide ImageBuf for directly manipulating images.
Provide DynamicImage for images whose pixel type is determined at
runtime.
Improve the Pixel trait
Rearrange library(again)
Merge pull request #51 from ccgn/master

Implement immutable and mutable pixel iterators.
Update example
Merge pull request #52 from ccgn/master

Update example
Add an example Demonstrating generating fractals
Merge pull request #53 from ccgn/master

Add an example Demonstrating generating fractals
Update README.md
Update README.md
Update README.md
Update README.md
indentation fix
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Add example image
Update README.md