Fix failing Docs::Requester test
Make Docs:Requester#request accept an array of URLs
Make Docs::UrlScraper#request_all accept an array of URLs
Make Docs::FileScraper#request_all accept an array of URLs
Implement initial_paths scraper option
Implement Docs::Filter#initial_page?
Refactor PHP scraper with new initial_paths option
Refactor Docs::Scraper
Disable phone number detection on mobile devices
Update Apple touch icons
Update README.md and CONTRIBUTING.md