update examples

.cargo/config

.gdbinit

.gitignore

.travis.yml

Xargo.toml

ci/script.sh

examples/blinky-await.rs

examples/blinky-blocking.rs

examples/blinky-futures.rs

examples/blinky.rs

examples/capture1.rs

examples/capture2.rs

examples/capture3.rs

examples/capture4.rs

examples/claim.rs

examples/concurrent-await.rs

examples/concurrent-futures.rs

examples/concurrent.rs

examples/cpu.rs

examples/gpio.rs