Fix asset paths for cargo-built executables

Building the example executables with cargo, the binaries are placed in a
"target" folder, not "bin". Thus, the assets can not be found by such
executables. Pointing the AssetStore to "../bin/assets" fixes this.
Merge pull request #9 from aepsil0n/fix_asset_paths

Fix asset paths for cargo-built executables
Upgrade to latest Rust + Rust-Empty
Merge pull request #10 from bvssvni/master

Upgrade to latest Rust + Rust-Empty
Added capture of cursor

Closes https://github.com/PistonDevelopers/piston-examples/issues/11
Merge pull request #12 from bvssvni/master

Added capture of cursor
Remove unused 'read me' flag from Cargo.toml
Merge pull request #14 from bvssvni/master

Remove unused 'read me' flag from Cargo.toml
Added music example

Closes https://github.com/PistonDevelopers/piston-examples/issues/5
Merge pull request #15 from bvssvni/master

Added music example
Update to latest Piston

* Ignore Cargo.lock files
Merge pull request #17 from bvssvni/master

Update to latest Piston
Added gfx_triangle

Closes https://github.com/PistonDevelopers/piston-examples/issues/20
Merge pull request #21 from bvssvni/master

Added gfx_triangle
Updated to latest gfx-rs
Merge pull request #23 from bvssvni/master

Updated to latest gfx-rs
Added gfx_cube

Closes https://github.com/PistonDevelopers/piston-examples/issues/22
Merge pull request #24 from bvssvni/master

Added gfx_cube
Added piano.mp3
Merge pull request #25 from bvssvni/master

Added piano.mp3