Fixed Bad link to milestones
Closes #4918
Merge branch '4.2.1-wip' of github.com:FortAwesome/Font-Awesome into 4.2.1-wip

* '4.2.1-wip' of github.com:FortAwesome/Font-Awesome:
  Correct bootstrapcdn link
  Rename dot-circle-o to match naming conventions
  Punctuation fix.
  remove reference to bootstrap in getting-started