TravisCI: Use node v0.12
TravisCI: Use node v0.12

see https://github.com/kellyselden/ember-cli-output/blob/v1.13.8/.travis.yml#L4

rust-lang/crates.io,Susurrus/crates.io,achanda/crates.io,steveklabnik/crates.io,steveklabnik/crates.io,achanda/crates.io,rust-lang/crates.io,rust-lang/crates.io,steveklabnik/crates.io,Susurrus/crates.io,rust-lang/crates.io,achanda/crates.io,Susurrus/crates.io,achanda/crates.io,steveklabnik/crates.io,Susurrus/crates.io