docs: Remove greenkeeper reference

Author: christopherthielen

README.md

@@ -1,10 +1,9 @@
 # UI-Router for Angular  [![Build Status](https://travis-ci.org/ui-router/angular.svg?branch=master)](https://travis-ci.org/ui-router/angular)
 
-[![Greenkeeper badge](https://badges.greenkeeper.io/ui-router/angular.svg)](https://greenkeeper.io/)
-
 ### @uirouter/angular: State based routing for Angular (v2+)
 
 ---
+
 **[Tutorials](https://ui-router.github.io/tutorials/)** |
 **[API Docs](https://ui-router.github.io/ng2/docs/latest/)** |
 **[Guides](https://ui-router.github.io/guide)** |
@@ -16,15 +15,15 @@
 ---
 
 @uirouter/angular is a client-side [Single Page Application](https://en.wikipedia.org/wiki/Single-page_application)
-routing framework for [Angular](http://angular.io).  
-  
-Routing frameworks for SPAs update the browser's URL as the user navigates through the app.  Conversely, this allows 
-changes to the browser's URL to drive navigation through the app, thus allowing the user to create a bookmark to a 
+routing framework for [Angular](http://angular.io).
+
+Routing frameworks for SPAs update the browser's URL as the user navigates through the app. Conversely, this allows
+changes to the browser's URL to drive navigation through the app, thus allowing the user to create a bookmark to a
 location deep within the SPA.
 
-UI-Router applications are modeled as a hierarchical tree of states. UI-Router provides a 
-[*state machine*](https://en.wikipedia.org/wiki/Finite-state_machine) to manage the transitions between those 
-application states in a transaction-like manner. 
+UI-Router applications are modeled as a hierarchical tree of states. UI-Router provides a
+[_state machine_](https://en.wikipedia.org/wiki/Finite-state_machine) to manage the transitions between those
+application states in a transaction-like manner.
 
 ## Get Started