Fixed a SLFR Logging issue. Used Apache Logger instead -- works.
updated SchemaInferencerMapReduce to use new Titan type maker API. Fixed an SLF4J logging issue in titan-cassandra and titan-hbase adaptors.
Add log4j dep, remove slf4j binding exclusion
Manage slf4j-api and -log4j12 versions

This will prevent slf4j API and Log4j binding versions from diverging
even if Faunus's dependencies's versions of these libraries change in
the future.