Merge pull request #75 from joyrexus/master

add usage info for --csv options
add tail option to createChangesStream
seq should override tail in changesStream options
allow tail=num as well as tail=true
4.4.1
add contributors.md
add collaborators.md
make tail=num work correctly, adds to #77
4.4.2
fix subtle bugs in createChangesStream end logic
4.4.3
using normalizeUrl to normalize before push
Merge pull request #81 from jonrohan/master

using normalizeUrl to normalize before push