Rename letsencrypt_auto dir to match other dirs.

Originally, I had it in mind to move letsencrypt-auto inside this dir. However, now we'd like to copy it or link it to the root level, where people are used to finding it (at least for awhile). Since it would be confusing to have a letsencrypt-auto and a letsencrypt_auto right next to each other, we rename this folder.

letsencrypt-auto-source/Dockerfile

@@ -0,0 +1,33 @@
+# For running tests, build a docker image with a passwordless sudo and a trust
+# store we can manipulate.
+
+FROM ubuntu:trusty
+
+# Add an unprivileged user:
+RUN useradd --create-home --home-dir /home/lea --shell /bin/bash --groups sudo --uid 1000 lea
+
+# Let that user sudo:
+RUN adduser lea sudo
+RUN sed -i.bkp -e \
+      's/%sudo\s\+ALL=(ALL\(:ALL\)\?)\s\+ALL/%sudo ALL=NOPASSWD:ALL/g' \
+      /etc/sudoers
+
+# Install pip and nose:
+RUN apt-get update && \
+    apt-get -q -y install python-pip && \
+    apt-get clean
+RUN pip install nose
+
+RUN mkdir -p /home/lea/letsencrypt/letsencrypt
+
+# Install fake testing CA:
+COPY ./tests/certs/ca/my-root-ca.crt.pem /usr/local/share/ca-certificates/
+RUN update-ca-certificates
+
+# Copy code:
+COPY . /home/lea/letsencrypt/letsencrypt-auto-source
+
+USER lea
+WORKDIR /home/lea
+
+CMD ["nosetests", "-s", "letsencrypt/letsencrypt-auto-source/tests"]