added maven shade plugin to build jar for submitting into storm cluster
removed unnecesary files
removed hardcoded field list from AvroLogDecoder BaseFunction. Generalised functionality to work with any arbitrary list of avro fields
some code simplifications on BrokerSpout, specially constructors.
New Trident baseFunction for transforming date fields
minor changes
Updated maven deps (avro, pig, hadoop, storm, storm-kafka) and added some new deps
updated CLI parameters handling. new trident stage for date time transformation. several refectoring & simplifications on the topology code.
changed default values
removed unused class for CLI parameter handling
changed default values