Merge pull request #10 from mlr/master

Add linkprefix to rubyinside and jsninja sites
Adds Jobbox scrape closes #9
Adds JSON scraping functionality
Adds Ars Technica closes #8
Pagination for scraping multiple pages closes #1
Pagination for Github

Also adds the ability to set the start of the second page of results to
something _other than_ = 2
Adds pagination to remaining flights
Adds Hired link
Fixes twitter link for hacker.surf query
Kicks version of Hired copy with some Dos Equis
Adds Perl.com closes #7