Moved from >bird-style to @haddock@
Merge pull request #50 from tonyday567/haddock-style

Moved from >bird-style to @haddock@
Some tweaks to haddocks for consistent spacing

I'm keeping Tony's convention of fully left-aligned code blocks, with the
exception of diagrams, which will still have one space to the left.
Left-aligning the code blocks in the Pipes module