migration to rails 3.1
switch xml to json
Use `model_name` instead of `name` of a model class to generate links.

ActionPack in general uses model_name of a model class to determine
its links. We should also do that in our helpers, so we follow what
Rails does in general.

Also using model_name helps us in generating links for models, that
use STI, but should be available all under the same link. As
described in [1].
Using model_name even let us keep the flexibility to selectively use
different paths for a few subclasses of the main STI-model, by re-
implementing the model_name class.

[1] http://code.alexreisner.com/articles/single-table-inheritance-in-rails.html
fix translation lookup, model_name uses
switch to ajax test to jquery
update rdoc, package
simply call install
add haml support
add support for nested resources
test nested namespaces, more documentation
update to rails 3.2
some nesting tests
nicer styles for actions
nesting documentation
add travis config
add custom gemfile
add travis status image
only build for ruby
style for bootstrap support
no more before_filters to set the model entry