Updated to use Log4J 2.x and explicitly called out the SLF4J versions so they are all the same as Repose.
Merge pull request #230 from rackerlabs/REP-947

Updated to use Log4J 2.x and explicitly called out the SLF4J versions so...
Inititial TODOs.
Initial checkerFormat direct support.
Updated TODO.
Added @AffectsChecker annotation.
Annotate config checker options, return name/value pairs as Metadata or Map.
Rework passing config params to XSL.
Updated todo.
Added meta-check.xsl, warn if versions in loading checker.
Init warning on option mismatch.
We now warn where options or version numbers don't match in checker
Test to ensure checker format is detected correctly.