Fixed reset action docs (#157)
Fixed reset action docs (#157)

- Added the index
- Actions is now an array
Related to https://github.com/react-community/react-navigation/issues/59#issuecomment-276972783
half-shell/react-navigation,half-shell/react-navigation,kkamperschroer/react-navigation,half-shell/react-navigation,kkamperschroer/react-navigation,Steviey/win-react-navigation,Steviey/win-react-navigation,kkamperschroer/react-navigation,Steviey/win-react-navigation