Instead of the kindleit plugin, you might consider upgrading to the officially supported App Engine plugin with:
com.google.appengine
appengine-maven-plugin
1.7.6
It is pushed at every app engine release, so very soon will be available with 1.7.7
Then use mvn appengin:devserver
All app engine festures are exposed: jdo enhancers, endpoints(1.7.7) etc.