Replace #235.

This change was suggested by @abought.

Close #230.

Related with https://github.com/swcarpentry/lesson-template/issues/220.

CommonMark doesn't support definition list
and we have to workaround this limitation.

This commit removes the request
that line continuation start with four white spaces
because (1) CommonMark remove the white spaces and
(2) Pandoc doesn't care about it.

    $ pandoc <<EOF
    foo
    :   bar
        continue
    EOF
    <dl>
    <dt>foo</dt>
    <dd>bar continue
    </dd>
    </dl>
    $ pandoc <<EOF
    foo
    :   bar
    continue
    EOF
    <dl>
    <dt>foo</dt>
    <dd>bar continue
    </dd>
    </dl>

(even though the contents are not validated)

This is based on 966a0322 from gh-pages.

Thanks to @ChristinaLK to report the problem.

Our authors use this label to mark unfinished/work in progress lessons.

Implement template-specific callout rules. Add tests and fix bugs revealed.

Narrow def of callout: block must have heading.

Simplify way that callout counts are tracked, improve log messages, and add further unit tests of callout validation.

Ensure that callout validation is actually run

Changes to link text validation per #58 and #90. Validate link text in index.md (always), or only in headings (reference.md and instructors.md)

Demote msg level when http links skipped

Strip anchor from filenames in error messages

Fix typo

This reverts commit 0b370670.

Revert "Minor changes to make error messages consistent, and possibly less crashy. Still need unit tests to trigger this code."

This reverts commit 8c0819be.

Minor changes to make error messages consistent, and possibly less crashy. Still need unit tests to trigger this code.

Add validation methods and refactor ast helpers to separate class

Add tiny logging message; prep for first push to github fork

Start adding tests

Fix errors revealed by unit tests

Update validator to check heading order; tests passing

Validation of links and changes to heading validation

Tiny comment cleanup; push to share version with swc

Add some descriptive comments and create minimal validator example (for instructors.md) to demonstrate subclassing

Split helpers to separate file and update for newest index.md template

Grooming

Bring up to spec with newest versions of lesson templates. Add tests to ensure all templates pass validation.

Saner default assumption about markdown file locations

Add skeletons for remaining validators. Incorporate ranier's code for batch validation.

Code changes for single-file python 2 and 3 compatibility.

Refactor out template validation logic in prep for cmd line rework

Proof of concept refactor to command line sig for @rgaia-cs (issue #34)

With no path provided, default to curdir, not a hard-coded default

Implement license and discussion validators. Some test cleanup.

Validate file links against page titles. Add line length check.

Fix python3 hash error

Rename validator to check

Conflicts:
	tools/validate_markdown_template.py

Enforce section heading levels + pep8 cleanup

Improved link validation for non-html files

Validate images as well as links

Verify that all headings are exactly level 2

Link text validation based on document header "subtitle" instead of "title".

Adjustments based on run against the SQL repo.

Fix links to topics

By default only show erros and warnings to user

- Add another argument for CLI to enable debug log level
- Change some log message to debug instead of info
- Add file information for errors and warnings

Fix import at check

From [PEP8](https://www.python.org/dev/peps/pep-0008/#imports)

> Imports should usually be on separate lines, e.g.:
>
> Yes: import os
>      import sys
>
> No:  import sys, os

Heading bugfixes, update failing tests, and cleanup. fix swcarpentry/lesson-template#39, swcarpentry/lesson-template#42 .

Add validation of glossary

Slight clarification to log messages.

Skip validate some links in index

Fix super() call for python2; avoid mutable default argument.

Lesson template validator.

and others small fixes.

1. Moving all commands into a Makefile (because we're handling file dependencies, and that's the right tool for it).
2. Ignoring the .html files produced in the root directory for now.
3. Switching to a single layout modeled on that used for workshop websites - will need to update this.

* Add `.nojekyll` to stop GitHub trying to compile.
* Get rid of Jekyll `_config.yml`.
* Create placeholder `css` and `img` directories.
* Create `pages` directory with source for web pages.
* Move all Markdown files into `pages`.
* Move `tools` into `pages` (because that's where people will mostly work).
* Move `_includes` and `_layouts` into `pages` (because that's where we'll compile).