Skip writable checks on output
created an override option for the default sequence file link, also removed some unnecessary mustBeWritable checks
Refactored MetadataWriter into separate class
Merged rlau changes with MetadataWriter changes
fixed scamr.local.mode bug with CDH5 MRv2
removed unused cdh3/cdh4 support
removed unused scala 2.9.x support, cleaned up deprecation warnings, use 2.10-style string interpolation
A fix for issue #5: job client resource leak
Addressed code review comments
added support for user callbacks that get invoked at the end of an MR job
Small refactoring of an Option in MetadataWriter
Removed MetadataWriter from job run
Merge master into SkipWritableChecks and make Metadata a callback
Fixed merge issue
Merge pull request #6 from ibuenros/2014/08/20/buenrostro/SkipWritableChecks

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