keep out log4j dependency since slf4j backend should be decided by application not library (also its already on hadoop classpath and slf4j complains when multiple versions of backend are detected on classpath)
Merge pull request #636 from tresata/feat-no-log4j-deps

keep out log4j dependency since slf4j backend should be decided by appli...
parquet support for scalding (work in progress)
create sbt project for scalding-parquet
test scalding-parquet (don't know how)
skip duplicate "..org.slf4j/slf4j-api/pom.*"
what is it doing in parquet-format.jar (shade plugin)?