test-in-docker: quickly test frameworks in docker

This adds `./test-in-docker` for quickly playing with various frameworks.

All the containers are based off Ubuntu 14.04 which has ZSH 5.0.2.

Thanks to @dritter for figuring out all the framework installation
methods.

docker/antibody/Dockerfile

@@ -0,0 +1,7 @@
+FROM p9k:base
+
+COPY docker/antibody/install.zsh /tmp/
+RUN zsh /tmp/install.zsh
+
+COPY ./ p9k/
+COPY docker/antibody/zshrc .zshrc

docker/antibody/install.zsh

@@ -0,0 +1 @@
+curl -sL https://git.io/antibody | bash -s

docker/antibody/zshrc

@@ -0,0 +1,2 @@
+source <(antibody init)
+antibody bundle ~/p9k/