adopt slf4j in httpserver
fix: incorrect assert test
Changed more print statements to slf4j logging
Merge pull request #14 from walmartlabs/hash-apply-assertion-fix

fix: incorrect assert test
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
hash ring is in. But system is not tested yet
Message Server and Local Message Server are working now
Replace ring in MapUpdatePool with AppRuntime
Merge branch 'dev' of github.com:walmartlabs/mupd8 into dev

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