Major overhaul of temperature logic. Behavioral change.

I think the reason the temperature logic was so confused in the old code
is because the Java code has a class `Temperature` that is used for
graphical display *and* two variables in `formulas` that are used for
most of the actual math. But somewhere along the line, some of the code
in `formulas.java` started reading from `Temperature.value` as well.
So the Python code was just faithfully copying that confusion.

The actual abstraction here is a very simple "temperature" object
with a stored value. It can be "clamped" to 100.0 for a given period.
The only complication is that one of the codelets (the rule-transformer
codelet) wants to get access to the "actual value" of the temperature
even when it is clamped.

The Python rule-transformer codelet also had a bug: it was accidentally
setting `temperature.value` on the `temperature` module instead of on
the `temperature.temperature` object! This turned some of its behavior
into a no-op, for whatever that's worth.

Lastly, the calculation of `finalTemperature` in the main program can
now report 100.0 if the answer is found while the temperature is clamped.
I don't fully understand why this didn't happen in the old code.
I've hacked around it with `temperature.last_unclamped_value` for now,
but I should TODO FIXME.

copycat/codeletMethods.py

@@ -3,7 +3,7 @@ import logging
 import random
 
 from slipnet import slipnet
-import temperature
+from temperature import temperature
 import formulas
 from workspaceFormulas import chooseDirectedNeighbor
 from workspaceFormulas import chooseNeighbor
@@ -130,7 +130,7 @@ def __slippability(conceptMappings):
 
 @codelet('breaker')
 def breaker(coderack, codelet):
-    probabilityOfFizzle = (100.0 - formulas.Temperature) / 100.0
+    probabilityOfFizzle = (100.0 - temperature.value()) / 100.0
     if formulas.coinFlip(probabilityOfFizzle):
         return
     # choose a structure at random
@@ -804,13 +804,11 @@ def rule_translator(coderack, codelet):
         if bondDensity > 1.0:
             bondDensity = 1.0
     cutoff = __getCutOff(bondDensity) * 10.0
-    assert cutoff >= formulas.actualTemperature
-    if workspace.rule.buildTranslatedRule():
-        workspace.foundAnswer = True
-    else:
-        temperature.clampTime = coderack.codeletsRun + 100
-        temperature.clamped = True
-        formulas.Temperature = 100.0
+    if cutoff >= temperature.actual_value:
+        if workspace.rule.buildTranslatedRule():
+            workspace.foundAnswer = True
+        else:
+            temperature.clampUntil(coderack.codeletsRun + 100)
 
 
 @codelet('bottom-up-correspondence-scout')