Added apply variants to ArgWritable to support reading from sequence files in ArgHadoopDriver
progress checkin: add GeneratePartitionedMapFiles
add Local operations issue #478
add io.map.index.interval to GenerateMapPartitionedFiles
initial commit of LoadImageRDD and GeotrellisSparkUtils
add new local operations to LocalOpMethods
add sbt-dependency-graph to project build
remove junit runner from tests
initial commit of TileIdPartitioner - a partitioning scheme for HDFS-based RDDs of tiles
fix TmsTiling methods to work on the correct type (Double or Long)
add height/width to TileBounds
initial commit of SaveImageFunctions - the ability to save an RDD of tiles to HDFS
initial commit of GeotrellisSparkUtils
minor fixes to LoadImageRDD
enable kryo serialization for TileIdWritable and ArgWritable
TileIdPartitioner refactoring to correctly ser/des from spark tasks
expose TileIdPartitioner to LoadImageRDD and move main out of LoadImageRDD
minor modification: change Exception to sys.error and use scala 2.10 string substitution
Update README.md

Added Contributing info.
Merge remote-tracking branch 'upstream/master' into input-output-format

Conflicts:
	project/Build.scala
	project/plugins.sbt