Merge pull request #8 from bvssvni/master

Upgraded to latest Rust-Empty
Merge pull request #9 from bvssvni/master

Added symlink build script
Merge pull request #11 from bvssvni/master

Added capture cursor support
Added maintainers
Set correct GL version
Merge pull request #14 from kazimuth/versionhint

Set correct GL version
Expose more GLFW internals

Allows creating the game window with an already-created GLFW window. It will
query the settings it can from that. Also makes the window/glfw fields public,
to allow users to do things that the GameWindow design might not account for.

Closes #15
Remove use of deprecated push_back
Merge pull request #16 from cmr/more-flexibility

More flexibility
Fixed Cargo settings

* Ignore Cargo.lock
* Removed unused readme field in Cargo.toml