feat: initial commit for 100.dathere.com and first exercise

bash_kernel/README.rst

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+A simple IPython kernel for bash
+
+This requires IPython 3.
+
+To install::
+
+    pip install bash_kernel
+    python -m bash_kernel.install
+
+To use it, run one of:
+
+.. code:: shell
+
+    ipython notebook
+    # In the notebook interface, select Bash from the 'New' menu
+    ipython qtconsole --kernel bash
+    ipython console --kernel bash
+
+For details of how this works, see the Jupyter docs on `wrapper kernels
+<http://jupyter-client.readthedocs.org/en/latest/wrapperkernels.html>`_, and
+Pexpect's docs on the `replwrap module
+<http://pexpect.readthedocs.org/en/latest/api/replwrap.html>`_