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
replace hash map with optimized data structure to avoid excessice allocations
Removed `rustc/cargo -v` from .travis.yml

See https://github.com/PistonDevelopers/piston/issues/794
Merge pull request #218 from bvssvni/master

Removed `rustc/cargo -v` from .travis.yml
fix some bugs
Some cleanup
Merge pull request #219 from nwin/speed_up_lzw

Speed up lzw
Move the palette expansion into the buffer.
Merge pull request #220 from nwin/speed_up_lzw

Move the palette expansion into the buffer.