Fix links

README.md

@@ -3,15 +3,15 @@
 The Apptentive Android SDK is the best way to engage your mobile customers. Use it to learn about how your customers
 use your app, to talk to them at the right time, and in the right way.
 
-#### To get started, read our [Integration Guide](https://learn.apptentive.com/knowledge-base/android-integration/)
+#### To get started, read our [Integration Guide](https://learn.apptentive.com/knowledge-base/android-integration-reference/)
 
-#### [Android Interface Customization](https://learn.apptentive.com/knowledge-base/interface-customization-android/)
+#### [Android Interface Customization](https://learn.apptentive.com/knowledge-base/android-interface-customization/)
 
 #### [Apptentive SDK API Javadoc](http://www.apptentive.com/docs/android/api)
 
 ##### [API Changes here](docs/APIChanges.md)
 
-##### [Release Notes](https://learn.apptentive.com/knowledge-base/android-sdk-releases-notes/)
+##### [Release Notes](https://learn.apptentive.com/knowledge-base/android-sdk-release-notes/)
 
 ##### Binary releases are hosted for Maven [here](http://search.maven.org/#artifactdetails|com.apptentive|apptentive-android|3.4.0|aar)