Cosmetic: switch case order in spawn to mimic signature
Merge pull request #21 from PierreR/master

Cosmetic: switch case order in spawn to mimic signature
Added new buffer type 'New'

Like 'Latest' but with a guaranteed write between any two reads.

Conflicts:
	src/Pipes/Concurrent.hs
Merge pull request #19 from urv/master

feature: added a new buffer type 'LatestOnce'