changed active_attr version dependency in gemspec
added support for model migration
migrate_models > migrate refactoring
moved Redis.track to ModelMigration.track_change
edited migration comments
tracked > changes renaming
added ModelMigration.prefix_index
big refactoring and renaming
added sync support for ActiveModel
better save options for ActiveModel
simpler redis keys
added progress bar to migrate
renamed class/klass > model
added :ensure_indices option
migration > live_reindex refactoring
safer trail
changed live_reindex opt to import_collection
redis keys refactoring and improved check and errors
better refresh callbacks
split live_reindex.rb into separate files