Add configurable for routes position, ability to remove routes, fix handling of output from newer Rake versions.

(For example, the Zookeeper gem...)

Adjust expected location of Factory Girl factories.

Integrate various fixes around finding model classes, including https://github.com/ctran/annotate_models/pull/82 and https://github.com/ctran/annotate_models/pull/85

JRuby ObjectSpace compatibility fix

expect a model without primary key

By default, ObjectSpace.each_object is disabled in JRuby. However,
ObjectSpace.each_object(Class) still works.