beta 0.6.0

can now work with plugins;
opConfig changes:

• rules_file && asset_name => rules: ['assetName:path']
• plugins: ['assetName:path']
• selector_config => types
• removed actions, connection and index fields
  Example:

        {
            type: 'transform',
            rules: ['some/path', 'other/path')],
            plugins: ['path/to/plugin']
            types: { _created: 'date' }
        };

Example Plugin:

import NoOp from './noop';
import Double from './double';

export default class Plugin {
    init() {
        return {
            noop: NoOp,
            double: Double
        };
    }
}