Revamped the category search entirely. Fixed so that it is possible to search for several categories at once.
Updated readme
Added share to facebook-button. Also added a footer declaring copyright, and links to github/youtube. Also fixed a bug where the script turned viewcount = 0 into the default setting (50)
Merge pull request #25 from johanasplund/master

Major revamp of category search, social media button, footer and bugfix