changed version: 1.2.0-SNAPSHOT
add "_key" property in DocumentEntity
Fix testcase, Collection returns CollectionName instead of CollectionId.
upgrade junit library to 4.11 from 4.10
Fix testcase, Collection returns CollectionName instead of CollectionId.
test for 1.2.beta3
Add support InMemory Collection.
Rename getter method of isSystem,isVolatile.
debug logging PUT/POST body.
Add support: create collection with createOptions parameter.
add support: getCollections with excludeSystem parameter.
add support: loadCollection with count parameter.
add support: change collection's journalSize property.
update http-client library: 4.1.3 -> 4.2.3
 for HTTP-PATCH Action.
Use PoolingClientConnectionManager instead of
ThreadSafeClientConnManager in HttpManager.
Because ThreadSafeClientConnManager is deperecated in HC-4.2
add support: HTTP Patch METHOD.
JSON Serializer contains Null Value.
add support: partial update
switch json serializer when keepNull is false.
fixed typo.