Run multiple iterations. Print final temperatures. Reduce stdout spew.

This makes the output of the program more closely resemble that of the
original Copycat described in "FCCA" page 236:

> [T]he average final temperature of an answer can be thought of as
> the program's own assessment of that answer's quality, with lower
> temperatures meaning higher quality.

For example, running `python main.py abc abd ijk 100` produced the
following output:

    ijl: 98 (avg temp 16.0)
    jjk: 1 (avg temp 56.3)
    ijk: 1 (avg temp 57.9)

And for `python main.py abc abd ijkk 100`:

    ijkkk: 2 (avg temp 19.8)
    ijkl: 51 (avg temp 28.1)
    ijll: 46 (avg temp 28.9)
    djkk: 1 (avg temp 77.4)

copycat/codeletMethods.py

@@ -31,7 +31,7 @@ def __showWhichStringObjectIsFrom(structure):
         whence = 'target'
         if structure.string == workspace.initial:
             whence = 'initial'
-    print 'object chosen = %s from %s string' % (structure, whence)
+    #print 'object chosen = %s from %s string' % (structure, whence)
 
 
 def __getScoutSource(slipnode, relevanceMethod, typeName):