wip: extend
added documentation

added text under 'test methods API' and 'UNIX pseudo devices API'
wip: extend
added documentation

added text under 'test methods API' and 'UNIX pseudo devices API'
Merge branch 'doc' of github.com:lfortin/node-stream-tk into doc
moved comment
extend: added a test
Merge branch 'dev-extend' into dev
added documentation for .extend()
Merge branch 'doc' into dev
new version 0.1.0