Fix #1
Bump version
Fix #2 - BREAKING CHANGE
* All nav trees that use no arg lambda's will stop working in this
  version.
* To upgrade to 1.0.0 or higher you need to make all nav step functions
  take 1 arg (and 1 arg only).  If you don't care about the arg, try
  `lambda _: click('foo')`
Add a new fn function that returns functions with 1 ignored arg
Add partial and fix bug when using nav starting point