Merge pull request #418 from blongden/2.0.x

Adds enabled mapping option (default true)

DependencyInjection/Configuration.php

@@ -311,6 +311,7 @@ class Configuration implements ConfigurationInterface
             ->scalarNode('term_vector')->end()
             ->scalarNode('null_value')->end()
             ->booleanNode('include_in_all')->defaultValue(true)->end()
+            ->booleanNode('enabled')->defaultValue(true)->end()
             ->scalarNode('lat_lon')->end()
             ->scalarNode('index_name')->end()
             ->booleanNode('omit_norms')->end()