Changed more print statements to slf4j logging
Converted more println to slf4j.
Convert println in messageServer to slf4j; covert some dummy log() function calls to slf4j; modify logging message wording
Merge pull request #16 from zheguang/master

Println to SLF4J
workaround: unit-test race between server and client start
Merge branch 'master' into object-slate

Println to SLF4J

Conflicts:
	src/main/scala/com/walmartlabs/mupd8/Mupd8Main.scala