index: correct link to repo on github
04: Services in Silex
04: Examples: htmlentities
04: built-in service providers: twig, swiftmailer, doctrine dbal
04: Repositories and Conclusion
04: typos
04: MVC rewording
ws2-sws-fiddles updated to latest version
ws2-sws-fiddles updated to latest version
Updated ws2-sws-fiddles-silex to latest version