initial version of through method
add test for through using stream and function in succession
started test for pipeline
start pipeline method
add some docs for pipeline
update docs for pipeline
update example code in intro to use pipeline
rebuild dist and docs
release 1.21.0
don't use carat in versions for dependencies as it breaks node 0.8.x
release 1.22.0
fix piping in of streams to pipeline, fixes #69
release 1.23.0
rebuild dist and docs
fix use of pipeline with no arguments, towards #68
release 1.24.0
rebuild dist and docs
support of pack
missed error handler
use _.isArray for old browser compatibility