Use component in willTransitionFrom, not descriptor

Fixes #47
Use activeQuery
set displayName for nicer debugging
Merge pull request #51 from litek/master

Set displayName for nicer debugging
reserve className param
Merge pull request #53 from litek/master

Reserve className param
update active state when changing props
Merge pull request #54 from litek/master

Update active state when changing props
Use + instead of %20 to encode spaces in URLs
[fixed] injectParams invariant should not throw on values that coerce to false.
Merge pull request #55 from nhunzaker/master

[fixed] allow 0 in path params
Update package.json

implement the correct format for repository
Merge pull request #64 from bobeagan/patch-1

Update package.json
Merge branch 'master' into feature/param-constraints
check constraints are passed in (to fix tests)