v0.1.2

• Improve handling of environment file specification (#63)
• Stop running container on SIGINT (#62)
• xcetool image run --server prints server and viewer URLs (#46)
• Improve documentation (#54, #55)
• Improve type annotations and checks (#68)
• Include Dockerfile in built images (#55)
• Look for environment.yml automatically (#41)
• Allow xcengine image run to pass arguments to the container (#57, #77)
• Add option for xcengine image run to open a browser window (#58)
• Add option to skip image build and just create Dockerfile and context (#60)
• Refactor code and improve test coverage (#40, #80)