[maven-release-plugin] prepare release 1.6.0
[maven-release-plugin] prepare for next development iteration
Merge remote-tracking branch 'origin/1.6.0-SNAPSHOT' into 1.6.1-SNAPSHOT
Merge branch '1.6.1-SNAPSHOT'

Conflicts:
	assemble/pom.xml
	core/pom.xml
	docs/pom.xml
	examples/simple/pom.xml
	fate/pom.xml
	maven-plugin/pom.xml
	minicluster/pom.xml
	pom.xml
	proxy/pom.xml
	server/base/pom.xml
	server/gc/pom.xml
	server/master/pom.xml
	server/monitor/pom.xml
	server/native/pom.xml
	server/tracer/pom.xml
	server/tserver/pom.xml
	start/pom.xml
	test/pom.xml
	trace/pom.xml
ACCUMULO-2343 Add AsyncSocketAppender

AsyncSocketAppender is a Log4J AsyncAppender with its own internal SocketAppender.
Configuration for either appender can be set on the AsyncSocketAppender itself. An
AsyncSocketAppender can be configured using a Log4J properties file, while an ordinary
AsyncAppender cannot.
Merge branch '1.6.1-SNAPSHOT'
ACCUMULO-2383 Add log4j properties support

Accumulo now looks for either XML or properties files for the Log4J configuration. It will
also heed the log4j.configuration isystem property if it is set. Its MonitorLog4jWatcher
can now load either properties or XML.
Merge branch '1.6.1-SNAPSHOT'
Merge branch 'master' into ACCUMULO-378
ACCUMULO-2583 First stab at setting up the actual wire transfer to the replication peer

Changed a few things in the thrift idl to make a little more sense. Use the protobuf
Status message that we already have as the response object to the replication. This
allows the peer to not have to process the entire message at one time as an optimization (later).

Made a ReplicationClient in the same spirit as the MasterClient, but with a few notable
changes. Since we're operating outside of the local instance, we don't want to make
the same assertions about availability and blocking until we get a connection as is
the case in talking to the master. This pushes a bit of the logic into the replication
setup code, but this is desirable as we can better handle failure/retry logic as we intend.
ACCUMULO-2583 Get compilation working with slf4j dependencies. Lift the retry count into a Property.

Left a todo for myself as well.