Removed printing every step in gpu library.
Remove multithreading stuff.

Didn't work anyway.
Added num-synsets cl arg.

For specifiying the size of the subset of WordNet we want to work with.
Made debug printing more readable.
Added shortsent cl arg.

For only probing 1 item in a sentence. Good for testing.
Probing almost working in CPU neural cleanup.
Added *single* test.

Can specifiy an HRR expression on the command line, and use the memories
to extract from that.