Add FAQ page with info on line endings (#246)

Author: WasabiFan

docs/faq.rst

@@ -0,0 +1,20 @@
+requently-Asked Questions
+==========================
+
+My script works when launched as ``python3 script.py`` but exits immediately or throws an error when launched from Brickman or as ``./script.py``
+-----
+
+This may occur if your file includes Windows-style line endings, which are often
+inserted by editors on Windows. To resolve this issue, open an SSH session and
+run the following command, replacing ``<file>`` with the name of the Python file
+you're using:
+
+.. code:: shell
+
+    sed -i 's/\r//g' <file>
+
+This will fix it for the copy of the file on the brick, but if you plan to edit
+it again from Windows you should configure your editor to use Unix-style endings.
+For PyCharm, you can find a guide on doing this `here <https://www.jetbrains.com/help/pycharm/2016.2/configuring-line-separators.html>`_.
+Most other editors have similar options; there may be an option for it in the
+status bar at the bottom of the window or in the menu bar at the top.

docs/index.rst

@@ -12,6 +12,7 @@
 
    spec
    rpyc
+   faq
 
 Indices and tables
 ==================