Moved children method to SpiderSeo::Utils
Implemented two microdata's methods
Refactored a little
Refactored most used methods
Resolved merge conflicts
Refactored spider-seo.rb
Hotfix : removed a useless end (what did it do there?)
Implemented possibility to count tags instead of listing them, added aliases for h1 and h2 tags
Implemented internal and external links getters