Merge pull request #157 from bvssvni/master

Upgraded to latest Rust
Implemented proper error handling for the UiContext constructor
Merge pull request #161 from mitchmindtree/master

Implemented proper error handling for the UiContext constructor
hashmap in std::collections is now called hash_map
Merge pull request #162 from eklavya/master

hashmap in std::collections is now called hash_map
fix 32 bit builds, fixes #151
Merge pull request #164 from eklavya/master

fix 32 bit builds, fixes #151
fix example
Merge pull request #165 from eklavya/master

fix example
change point type to use graphics::vecmath::Scalar instead of u64
Merge pull request #167 from eklavya/master

change point type to use graphics::vecmath::Scalar instead of u64
Theme.save returns a Result now, fixes #142
Merge pull request #168 from eklavya/master

Theme.save returns a Result now, fixes #142
Theme.load returns a Result now, fixes #141
Merge pull request #169 from eklavya/master

Theme.load returns a Result now, fixes #141
Added link to how to contribute

See PistonDevelopers/piston#715
Added fully qualified namespaces to enums. As well changed impl<Int> to
impl<Float> and changed any instance of abs(number) to use number.abs()
Merge pull request #170 from dgriffen/master

Update conrod to latest rust
Updated all_widgets example to match API changes
Remove compiler warning for pow