blog post: Mac development environment

 On branch content

	modified:   app/public/lesscss/main.less
	modified:   app/public/sitemap.xml
	modified:   content/blogs/web_development/backbone_single_event.md
	modified:   content/blogs/web_development/index.md
	new file:   content/blogs/web_development/setup_mac_osx_web_development_environment.md
Merge branch 'content'