add more lint command

[k-okada]

• add roslint_xml

  Using lxml.tostring(pretty_print) to find dirty xml files

  For similar fixes in xml, try find . -iname *.xml -exec rosrun roslint
  xmllint --fix {} ;

• add roslint_markdown

  Using pymarkdownlint to find dirty markdown files, specially tailing end, wrong indent

  using https://github.com/jorisroovers/pymarkdownlint

• add roslint_catkin, which runs catkin_lint

  Runs catkin_lint within catkin run_tests
  see https://github.com/fkie/catkin_lint for more info

• add roslint_yaml function

  Runs yamllint to find dirty yaml files

  For similar fixes in YAML, try pretty-yaml
  (https://github.com/mk-fg/pretty-yaml) pip install --user pyaml
  find . -iname "*.yaml" -exec python -m pyaml -r {} ;