YARN-913 sanjay feedback: move zk services under .zk; rename client/services client/impl, rename create() to bind(), with flags
YARN-913 exceptions on resolution falure don't include service header text ... implementation detail
YARN-913 slight improvements in package-info for server/ package
YARN-913 curator instance creation is synchronized on CuratorService.class; ensures only one instance is setting system properties at a time
YARN-913 adding support for arbitrary attrs in a service record
YARN-913 move yarn_id from field in service record to string-defined extra attribute
YARN-913 persistence policy in service record is now string value
YARN-913 service records propagation tests, including constructors
YARN-913; persistence is now an arbitrary attr
YARN-913 prepare for removal of yarn and persistence direct getters
YARN-913 drop constructor that took Id & persistence
YARN-913 moving service record attributes to a map
YARN-913 move getYarn_id logic to always get from attribute map; rename attr yarn:id
YARN-913 update registry specification
YARN-913 persistence policy set via set() method
YARN-913 move registry package to org.apache.hadoop.registry
YARN-913 "resolve()" operation
YARN-913 move registry markdown files to yarn-site and link to from index.html
YARN-913 service specification updated; .gitignore patched to ignore all generated artifacts/directories