Merge branch 'gh-pages' of github.com:swcarpentry/lesson-template into gh-pages

    *   `suitable-for-newcomer`: issue or pull request is a good starting point for someone who is relatively new to GitHub and/or this project

    *   `work-in-progress`: a pull request that is not yet ready for review

*   *How create non-Python input cells?*

    Use

        ~~~ {.lang}

        some code

        ~~~

    where `lang` is `bash` for the Unix Shell, `r` for R, `matlab` for MATLAB,

    `sql` for SQL. For a full list, check

    ~~~

    $ pandoc -v

    ~~~

## Debugging

Please add notes about problems and solutions below.

    Nothing else should be marked as bold text --- use *italics* for

    for all other emphasis.

5.  For Unix Shell commands use

        ~~~ {.bash}

        $ some-command

        ~~~

    For R code use

        ~~~ {.r}

        some code

        ~~~

    For MATLAB code use

        ~~~ {.matlab}

        some code

        ~~~

    For SQL code use

        ~~~ {.sql}

        some code

        ~~~

## Motivational Slides

Every lesson must include a short slide deck suitable for a short