Merge pull request #1 from adamtomecek/master

feat(bulk_delete): add bulk_delete and checkboxes for bulk actions
fix: fix sanitize params for nested forms by belongs_to and has_one
refactor(default_query, tests): change .default_query usage and fix test in random order

Tests are now executed in random order. Each test is now further isolated with
    RailsAdmin::Config.reset
    RailsAdmin.config do |c|
      c.included_models = Basepack::Utils.detect_models
    end

BREAKING CHANGE: To set default filter define #default_query_params method in proper
controller. Usage of .default_query will not work any more.
feat(bulk_edit): bulk editing of items
Releasing v0.0.1
chore(release): version 0.0.2
doc(README): added verion badge
chore: update dragonfly gem
feat(install generator): disable jbuilder generator
fix(localization): fix localization of buttons and forms
feat(tree list): nested tree list form