added EC2 provisioning, optimised docker for EC2, added python and

.gitignore

ansible/ec2-setup.yml

ansible/ec2-terminate.yml

ansible/ec2.ini

ansible/ec2.py

ansible/host-config.yml

ansible/roles/common/handlers/main.yml

ansible/roles/common/tasks/main.yml

ansible/roles/docker/handlers/main.yml

ansible/roles/docker/tasks/main.yml

ansible/roles/ec2/tasks/setup.yml

ansible/roles/ec2/tasks/terminate.yml

ansible/roles/ec2/vars/main.yml

ansible/roles/testrunner/tasks/main.yml

ansible/test-files/docker-cppjit/Dockerfile

ansible/test-files/docker-python/Dockerfile

ansible/test-files/testrunner.sh

ansible/testrunner-config.yml