document full path signatures

closes #82
note about versions in the README
changelog note
typo
[changed] npm registry name to react-router :D

Thanks for joining forces @jaredly!
release v0.4.0
warning message about the package move
[removed] Dependency on react/lib/emptyFunction
hmm, no fun colors I guess
sorry

I’m really not trying to rack up my commit count
note about semver
Merge pull request #114 from jaredly/master

readme typo