Cargo fmt again

Merge pull request #206 from OsnaCS/fix-warnings

Update glium to 0.23

Update to glium 0.22

Update to glium 0.20

Update to glium 0.19

Update glium to 0.18

Update to glium 0.17

Run `cargo fmt --all`

Update rustfmt config

Specify default binary to run in Cargo.toml

Allow floating point literals in range patterns

Fix "unnecessary parenthesis" warning

Fix warnings: add `dyn` to trait objects

Fix warning: replace `try!` with `?`