Merge pull request #19 from metajack/remove-glut

Remove glut.
Update to latest Rust.
Merge pull request #22 from metajack/rust-up

Update to latest Rust.
support android build
Enable scissoring on ContainerLayers
Merge pull request #23 from eschweic/glscissor

Enable scissoring on ContainerLayers
Merge pull request #24 from webconvforge/PRbase

support android build
Update to latest Rust
More Rust version updates
Merge pull request #25 from kmcallister/rust-upgrade

Update to latest Rust
Merge pull request #26 from kmcallister/rust-upgrade

More Rust version updates
Update to latest Rust
Merge pull request #27 from kmcallister/rust-upgrade

Update to latest Rust
Switch from -o to --out-dir.
Merge branch 'master-upgrade'

Reverts commits that weren't present. Those are now on cpu-rendering branch.