Updated docs

0.4.1

Updated README

Happy new year

Changes:
[BC] Changed prefix for abstract index manager definitions from '@' to '_'
Added '--cancel-current' option to index build command
Changed Repository $metadata scope to protected
Added update() method to index manager
Removed $all,$dynamicTemplates,$dynamicDateFormats from Document annotation
Added $options to Document annotation to allow for any custom options to be sent to ES as-is
IndexManager::dropIndex to not throw exception when index does not exist
Removed use of no longer existing %doctrine_cache.file_system.class%, %annotations.cached_reader.class%, %monolog.logger.class%, %monolog.handler.rotating_file.class% params
Fixed DocumentIterator::current() to return null for empty iterator
Allow issers to be used as getters for private boolean properties of documents
Added compatibility for SF3
Do not reset the id when cloning a document
Made DocumentParser::getPropertyAnnotationData private
Fixed RegisterDataProvidersPass to allow for one provider service to handle several types

Bug fixes:
Fixed bug with sfes.index_manager.class not being considered
Fix in DocumentLocator
Fixed reindexing to not check for the type of _id field gotten from data provider