EDUCATOR-1529

Django-format comments are now used to detect a django template.
Note: Django templates are still not linted.

This requires the next commit to work, but needed to be
is a separate commit to keep history.

- Lint directories and files in sorted order.
- Lint python blocks in Mako.

- Use AST to parse Python.
- Refactor Mako to use Python linting.
- Add optional verbose script argument.
- Skip tests.py files when linting.

- Lint JavaScript context for JavaScript violations
- Lint for Mako specific JavaScript rules
- Skip commented lines
- Change unicode to decode.utf8
- Count lint violations

- check proper use of JQuery functions
- check for concatenation with HTML strings
- add sort for output
- lint CoffeeScript

- Make mako-wrap-html fire when '<' found anywhere in unwrapped string
- Fix typo
- Fix quality errors
- Fix defect found when Python string broken over lines

Also include the following:
- new rule for strings that should be wrapped with HTML()
- allow expressions to use "| n, unicode"
- refactor string parsing into separate class
- switch end_index to be the index following the expression

- Add capability to run linter on file or directory
- Add rule for HTML() requiring Text()
- Add rule for HTML() and Text() being closed before format()
- Add rule for Text() unnecessary without HTML()
- Enhance expression parsing
- Add real arg parser for script
- Clean up unit tests

- Remove <%include> linting
- Remove dump_html_escaped_json

- Check includes for Mako templates
- Check display_name_with_default_escaped uses
- Add exceptions for Underscore and <%=
- Skip templates that are Django and not Mako
- Add pragma to disable errors
- Enhance unit tests
- Remove violation mako-js-string-missing-quotes
- Refactor line processing into StringLines

Changes include:
- Fix code review comments
- Add comments
- Rename variables and files

- Initial lint of Mako templates
- Initial lint of Underscore.js templates