Initial commit of WIP PR for terasort benchmark.

As discussed on list, this is a WIP for Spark Terasort.
Trying to compile this code in your ehiggs/spark project, terasort branch I get this:
[ERROR] /Users/tharsch/git/ehiggs/spark/examples/src/main/scala/org/apache/spark/examples/terasort/TeraInputFormat.scala:203: not found: value TeraScheduler
[ERROR]     if (job.getConfiguration().getBoolean(TeraScheduler.USE, false)) {
[ERROR]                                           ^
[ERROR] /Users/tharsch/git/ehiggs/spark/examples/src/main/scala/org/apache/spark/examples/terasort/TeraInputFormat.scala:204: not found: type TeraScheduler
[ERROR]       val scheduler = new TeraScheduler(
[ERROR]                           ^
[WARNING] 8 warnings found
[ERROR] two errors found


Where is the TeraScheduler class?