Remove non-existing toc item on modifying CSS classes
Remove reference to non-existing anchor #modifying-css-classes
Optional titles in links need to be in quotes
anchor links need to be lowercase
Fix rendering section link in dom.md's toc
Switch from repositories to repository in package.json since npm complains now
Merge pull request #113 from skiadas/docs-fixes

dom.md links fixes
Merge branch 'master' into dev
Fix typo
Merge branch 'master' into dev