includes: Enhance Twitter share link (#538)
includes: Enhance Twitter share link (#538)

* Include the page title before the URL
* If twitter.username is set, pass the `via` paramter for attribution
TheCodedSelf/thecodedself.github.io,Vel0x/vel0x.github.io,TheCodedSelf/thecodedself.github.io,Vel0x/vel0x.github.io,TheCodedSelf/thecodedself.github.io,Vel0x/vel0x.github.io