Add CircleCI support (#91)

* Initial guess at supporting CircleCI

joerick/cibuildwheel#90

* Add note about setup_remote_docker on Circle

* Add diagnostic print of entire docker command

* Add more diagnostic prints

* Retrigger for Circle build

* Preliminary .circleci/config.yml

* Add workflows to Circle

* drop osx on circle

* call python3 directly on circle

* drop repeat pip install

* use a virtualenv on circle

* use a virtualenv on circle... again

* use a virtualenv on circle... again... again

* setup_remote_docker on circle

* try to manually copy into docker on circle

* correct Host

* correct docker calls

* refactor docker calls

* take 2 on the docker cp destination

* more docker cp debugging

* more docker cp debugging... again

* docker cp explicitly to /project

* wait until docker container is up

* wait until docker container is up... again

* and copy results back

* and copy results back... again

* create /output in container

* create /output in container... again

* copy contents of container's /output

* Retrigger ci

* fix merge typo

* fix monotonic

* always install monotonic

* always install monotonic... again

* correct to use project_dir

* wait a bit longer and a bit smarter

* wait a bit longer and a bit smarter... again

* add back circle osx

* add back circle osx... again

* py2/3 for circle

* py2/3 for circle... again

* use python2.7 image on circle linux

* (mostly) remove unused ci host identification code

* skip inspecting docker for the container, just retry copy on failure

* cleanup docker container and images

* fully remove ci host detection

* docs and tidy

* add circle badge

setup.py

@@ -9,7 +9,10 @@ except ImportError:
 setup(
     name='cibuildwheel',
     version='0.9.4',
-    install_requires=['bashlex'],
+    install_requires=[
+        'bashlex',
+        'monotonic',
+    ],
     description="Build Python wheels on CI with minimal configuration.",
     long_description='For readme please see http://github.com/joerick/cibuildwheel',
     author="Joe Rickerby",