Fix issue old issue 301 (https://code.google.com/p/gwt-platform/issues/detail?id=301)

Create pull request from https://codereview.appspot.com/5988064/
Fix some checkstyle issues
Remove trailing spaces

to make checkstyle happy
Replaced the Bootstrapper annotations with GWT configuration properties

Fixes https://github.com/ArcBees/GWTP/issues/187
Unlock place manager when async calls fail
Domain conversion to objectify round 1
refactor gwtp-sample-carsore to gwtp-carstore
module name change in parent
Domain clean up
Merge pull request #190 from bmoritz/issue301

Fix Issue 301 from https://code.google.com/p/gwt-platform/
Merge pull request #193 from jbarop/issue-187-replace-prebootstrap-annotation

Replaced the Bootstrapper annotations with GWT configuration properties
Merge pull request #196 from hpehl/master

Unlock place manager when async calls fail.
Changing the objectify relationshipos to embedded for testing.
added indexing to each entity
refactor packages to gwtplatform
modified the pom, added app engine
Updated the gae plugin configuration
formatting
Worked on getting the google app engine running
spaces formatting in poms