implemented SVG helper and tested on single page
Merge branch 'master' into svg-hbs-helper
Merge branch 'master' into svg-hbs-helper
used svg helper in some other places
used helper in several other files
made viewBox, class, and role named helper parameters for clearer and easier usage
Merge branch 'master' into svg-hbs-helper

Conflicts:
	public/templates/main/article/index.hbs
Merge branch 'master' into svg-hbs-helper
added SVG helper unit tests
Merge pull request #141 from Wikia/svg-hbs-helper

Svg hbs helper