Updated documentation
Added 'toList'
Updated tutorial
Improved tutorial introduction
Changed back code blocks to not use hyperlinks

Tony mentioned that using @-style comments for code samples makes them difficult
to read the raw markup and I also found them a bit visually distracting.
However, I chose to keep the hyperlinks for stand-alone type signatures.
Updated tutorial
Added 'debug' function
Added INLINABLE pragma for 'next'
Changed 'debug' to the more general 'yieldAfter'
Added back `debug` for convenience