Adjusting text around markdown
Merge branch 'master' into issue-910-markdown-notes

* master:
  Update as per review comments
  Remove 'Function'
  Added marketing tool to Who Uses Dart
  Clarify Adwords for video
  Fixing mixin article example
  Tidy up the README
  Forgot the hero button
  Use download-btn on all download buttons
  Print the TOC; a bit condensed
  Adding hidden-print to a few places
Tweak text
Use 'inspired by markdown'
Merge pull request #963 from srawlins/issue-910-markdown-notes

Adjusting text around markdown