Merge pull request #3 from stef/master

[doc] initial about page
[mod] about page moved
[enh] about page added
[fix] missing header template added
[mod] header removed
[enh] about page mods
[enh] add js to install on firefox as search engine
Merge pull request #4 from rsdy/master

[enh] add js to install on firefox as search engine
[mod] github ribbon to about page
[enh] about page updates
[enh] categories to request callback
[enh] piratebay engine added
[enh] displaying seeders/leechers
[enh] magnet link added
[enh] thumbnails to youtube video results
[enh] about page update
[fix] description escaping
[enh] result rendering templates
[enh] image result template added
[enh][mod] using image template rendering