Merge branch 'release-0.4.0' into development

* release-0.4.0:
  Bump version for new release
Set hook to add help tab
Ignore pesky .idea folder
Replace html with shortcode on image insert
Implement shortcode
Remove error logging
Set up cheatsheet tab
Set up LESS
Create basic stylesheet
Enqueue admin stylesheet
Update cheatsheet table structure
Fill out cheatsheet entries
Table stylesheet updates
Bump version for feature release
Merge branch 'release-0.5.0'

* release-0.5.0:
  Add cheatsheet help tab and rework image insertion from media library with a shortcode