Fixed missing required bundle

If you installing just as folows you get ParameterNotFoundException, since required parameter from JMSSerializerBundle is missing in services.xml
Merge pull request #21 from me1ifaro/patch-1

Fixed missing required bundle
Check property reflection before using it.
Merge branch 'master' of git://github.com/jamesmoey/extjs-bundle
add parameters.yml.dist and auto creator parameters.yml with incenteev/composer-parameter-handler
Merge pull request #24 from AmsTaFFix/master

add parameters.yml.dist
Try to get association key for OneToOne relationship from the inverse mapping.
add generated files to .gitignore
fix callable expected
Merge pull request #27 from AmsTaFFix/fix_callable_is_expected

Fix callable is expected in bootstrap.php