Merge pull request #323 from masal/master

Use correct row id in row.js.erb
enable dynamic action group for collection
allow set label to group
set reverse for new associated records when is a belongs_to
avoid loading draggable lists when is not loaded
include id and virtual columns in xml/json/yaml formats
fix methods in json
remove prepend_before_filters because it was failing to get current_user in models for nested scaffolds

it was loading nested_parent_record (which checks permissions and current_user can be called from model) before setting current_user_method_proc
Rubygems broke builds on Ruby 1.8.7:

travis-ci/travis-ci#1793
rubygems/rubygems#763

This patch is a temporary workaround until rubygems is updated.
fix travis for other ruby versions
improve XML/JSON/YAML output
Typo in README.md
Merge pull request #328 from juanpastas/patch-1

Typo in README.md
fix chosen bridge with HABTM, fixes #329
fix for IE9
fix for rails4, ensure ActionView::Helpers::InstanceTag is not extended
fix vertical subform inside horizontal subform
vertical subform doesn't defaults to flatten anymore
fix typo
Merge pull request #330 from korobkov/master

fix typo