Remove slf4j and address minor formatting issue (tabs vs spaces) in pom.xml
I have no clue why slf4j was added in the first place as it is unused, but it causes issues in applications that don't want to have it in their classpath. Everyone is happier this way.
Merge pull request #26 from md-5/master

  Remove slf4j and address minor formatting issue (tabs vs spaces) in pom.xml