Merge pull request #73 from luixxiul/development

Development
Merge pull request #75 from luixxiul/development

dns prefetch added
Merge pull request #77 from luixxiul/development

lines, tabs, spaces were deleted
added option 'excerpt_snippet' for SEO
Merge pull request #78 from luixxiul/ui

added option 'excerpt_snippet' for SEO + rewritten hegel, locke, mill