add wire format for fixed avro type #301
add wire format for fixed avro type #301

* TODO: remove java classes and add sbt-avro plugin to sbt
Fixed https://github.com/NICTA/scoobi/issues/308: MR job numbering broken in HadoopMode for job plans with more than 1 layer

Fixed by computing, at each layer, the total number
of MSCRs in all previous layers, and plumbing that
down to configureMscr, where the "Step X of Y"
gets configured.
fixed the DObjectSpec on the cluster
Merge pull request #310 from ivmaykov/scoobi-308

Fixed https://github.com/NICTA/scoobi/issues/308: MR job numbering broken in HadoopMode for job plans with more than 1 layer
Merge commit 'c69ae49'
integrated the SpecificFixed format for avro pull request. fixes #301