Removed BerkeleyDBActor
Added read_2
Added *DoubleList*
Added store and cacheSize options to Worker.
partitionSize is now a long
Updated build to use a newer version of BerkeleyDB.
Wordcount now uses DoubleLists
Removed timestamp and endTime from Node.
Cleaned up Memoizer.
Cleaned up tabs and long lines in the tests.
Replaced Mods in Nodes with ModIds.
Updated ReadNode to contain ModIds instead of Mods
Converted ModIds to Longs
Took ReadNode.modId and updated off heap.
Took ModNode off heap.
Fixed issue with allocating too little memory, and the memory leak with
Read/ModNodes.
Deleted old reef files.
Reverted offheap stuff.
Added file option to Wordcount.
Join operator and tests