New method "Model.without_es_update!" to temporally disable callbacks (ie, for testing)
fix results with :load wrapper
removed InstanceMethods because of deprecation warning
fix caching indexes if development mode

Conflicts:
	lib/mongoid/elasticsearch.rb
add ways to disable autocreating indexes. Fixes #7. Thx @intrica
readme [ci skip]
New method "Model.without_es_update!" to temporally disable callbacks (ie, for testing)

Conflicts:
	lib/mongoid/elasticsearch/callbacks.rb
Merge branch 'master' of https://github.com/rs-pro/mongoid-elasticsearch

Conflicts:
	lib/mongoid/elasticsearch.rb
	lib/mongoid/elasticsearch/callbacks.rb
	spec/mongoid_elasticsearch_spec.rb