added char limit guidelines for examples, testimonials and also landing pages
Merge branch 'master' of https://github.com/airtasker/landing-page-cms

merge kangs changes for char limit examples
Merge branch 'master' of https://github.com/airtasker/landing-page-cms

Conflicts:
	html/example-editor.html
	html/landing-page-editor.html
Merge branch 'master' of https://github.com/airtasker/landing-page-cms