Fixed `PixelRectangle`
Merge pull request #416 from bvssvni/master

Fixed `PixelRectangle`
Implemented `Has` and `Can` for `SourceRectangle`

Closes https://github.com/PistonDevelopers/rust-graphics/issues/417
Closes https://github.com/PistonDevelopers/rust-graphics/issues/418
Merge pull request #419 from bvssvni/master

Implemented `Has` and `Can` for `SourceRectangle`
Added `AddSourceRectangle` trait
Merge pull request #421 from bvssvni/master

Added `AddSourceRectangle` trait
Implemented `AddSourceRectangle`

Closes https://github.com/PistonDevelopers/rust-graphics/issues/422
Closes https://github.com/PistonDevelopers/rust-graphics/issues/423
Merge pull request #424 from bvssvni/master

Implemented `AddSourceRectangle`
Moved methods `src_rect` to `RelativeSourceRectangle`

Closes https://github.com/PistonDevelopers/rust-graphics/issues/444
Merge pull request #445 from bvssvni/master

Moved methods `src_rect` to `RelativeSourceRectangle`
Renamed `circle_centered` to `circle`

Closes https://github.com/PistonDevelopers/rust-graphics/issues/446
Merge pull request #447 from bvssvni/master

Renamed `circle_centered` to `circle`
Removed 'up, left, right, down'

Closes https://github.com/PistonDevelopers/rust-graphics/issues/412
Merge pull request #448 from bvssvni/master

Removed 'up, left, right, down'
Updated readme to use www.piston.rs
Merge pull request #449 from leonkunert/master

Updated readme to use www.piston.rs
Added `ImageContext` and `ColorContext`

Closes https://github.com/PistonDevelopers/rust-graphics/issues/450
Merge pull request #451 from bvssvni/master

Added `ImageContext` and `ColorContext`
Implemented `AddRectangle` for `ImageContext`

Closes https://github.com/PistonDevelopers/rust-graphics/issues/452
Merge pull request #453 from bvssvni/master

Implemented `AddRectangle` for `ImageContext`