Changes includes:
  * Fixes for 64bit ledger ids
  * Fixed memory leak on read-only bookies
  * Fixed datasketches metric provider concurrency issue

* translate documents into japanese

* reference the same files under doc/images folder

* fixed typo

* delete unnecessary line

* Change the expression of a few words

* add a link to the translation in Documentation.md

reduce collection instances while generating metrics

PR from @sschepens  + tests and few fixes from @merlimat

* Fix for Infinite loop in PersistentReplicator.startProducer()

* Fix for Infinite loop in PersistentReplicator.startProducer()

Besides 500, other errors indicate that the server is having problems,
so close the connection to avoid sending requests to the same bad
server.  DefaultKeepAliveStrategy will look at the request and response
headers for other reasons to close, such as "Connection: close" headers.

* Handle unknown exception on authorization check

* fix test:init AuthorizationManager on Auth-enable and set status-500 on topic-lookup-internal-failire

* fail partitionMetadata on zk-failure

If there is an error in reading from ZK, DiscoveryService should fail when reading partitions metadata (#272)

* close http-connection on internal server error from broker

* broker kills current session on internal-server-error

* add broker-address into response for client-debugging

* connect dispatcher again on reset cursor complete

* Renaming methods

* Only disconnect consumers on cursor-reset

On batch-msg dispatching: broker should disconnect consumer which doesn't support batch-message  (#215)

* On batch-msg dispatching: broker should disconnect consumer which doesn't support batch-message

* Close consumer at broker-side without closing connection if consumer doesn't support batch-message

* Fail unsupportedBatchVersion-subscriber if topic has served batch-message