Add token encryption

curl "http://localhost:8080/token/$(./gear create-token --key-path=encrypted/fixtures env foo2)"
Merge pull request #94 from smarterclayton/add_token_encrypter

Add token encryption
Added basic container create/destroy integration tests
Wait for container to transition to running state.
Added restart and start/stop tests:
 * Added support to list containers and force kill containers to docker util library
 * Moved test container cleanup to suite teardown to avoid race conditions
 * Few bug fixes in tests
Test stability fixes:
* Added systemd based wait for container state change in additon to docker state change
* Reorder tests (to match order of container ids)
* Added "gear status" test
* Bumping up timeouts for slower VMs