Update to latest rust
Merge pull request #211 from bvssvni/master

Upgrade to latest Rust
[style] use where clause
Merge pull request #213 from nwin/master

[style] use where clause
Fix build error - from_utf8 returns a Result now
Replace deprecated into_string() with to_string()
Merge pull request #214 from zsiciarz/master

Update to latest rustc
Add infrastructure for animations
Add animation code
to result…
Fix GIF for some images like the sunflower
Merge branch 'master' into animation
Properly support animated image with delay = 0 and with frames smaller than the canvas
Merge pull request #215 from nwin/master

Add basic infrastructure for animation
add docs
Merge pull request #216 from nwin/master

add docs
docs
Merge pull request #217 from nwin/master

docs
Removed `rustc/cargo -v` from .travis.yml

See https://github.com/PistonDevelopers/piston/issues/794