plot_utils: let plot_temperature accept an array of Runs()

Makes more sense
diff --git a/cr2/__init__.py b/cr2/__init__.py
index 8a6baaa..e86d48b 100644
--- a/cr2/__init__.py
+++ b/cr2/__init__.py
@@ -54,9 +54,7 @@
     if "title" in plot_temp_kwords:
         del plot_temp_kwords["title"]
 
-    temperature_data = {title: [run_data.thermal, run_data.thermal_governor]}
-
-    plot_utils.plot_temperature(temperature_data, **plot_temp_kwords)
+    plot_utils.plot_temperature([run_data], **plot_temp_kwords)
     run_data.in_power.plot_load(map_label, **kwords)
     run_data.plot_allfreqs(map_label, **kwords)
     run_data.pid_controller.plot_controller(**kwords)
diff --git a/cr2/plot_utils.py b/cr2/plot_utils.py
index d76e49d..27ba514 100644
--- a/cr2/plot_utils.py
+++ b/cr2/plot_utils.py
@@ -90,27 +90,24 @@
     set_ylim(ax, ylim)
     set_xlim(ax, xlim)
 
-def plot_temperature(thermal_dict, width=None, height=None, ylim="range"):
+def plot_temperature(runs, width=None, height=None, ylim="range"):
     """Plot temperatures
 
-    thermal_dict is a dictionary with the first argument being the
-    label in the legend and the values a Thermal and ThermalGovernor
-    instance.  Extract the control_temp from the governor data and
-    plot the temperatures reported by the thermal framework.  The
-    governor doesn't track temperature when it's off, so the thermal
-    framework trace is more reliable.
+    runs is an array of Run() instances.  Extract the control_temp
+    from the governor data and plot the temperatures reported by the
+    thermal framework.  The governor doesn't track temperature when
+    it's off, so the thermal framework trace is more reliable.
 
     """
 
     ax = pre_plot_setup(width, height)
 
-    for name, data in thermal_dict.iteritems():
-        (thermal, gov) = data
-        current_temp = gov.data_frame["current_temperature"]
-        delta_temp = gov.data_frame["delta_temperature"]
+    for run in runs:
+        current_temp = run.thermal_governor.data_frame["current_temperature"]
+        delta_temp = run.thermal_governor.data_frame["delta_temperature"]
         control_temp_series = (current_temp + delta_temp) / 1000
-        thermal.plot_temperature(control_temperature=control_temp_series, ax=ax,
-                                 legend_label=name)
+        run.thermal.plot_temperature(control_temperature=control_temp_series,
+                                     ax=ax, legend_label=run.name)
 
     post_plot_setup(ax, title="Temperature", ylim=ylim)
     plt.legend(loc="best")
diff --git a/tests/test_plot_utils.py b/tests/test_plot_utils.py
index d350f05..90bf0d9 100644
--- a/tests/test_plot_utils.py
+++ b/tests/test_plot_utils.py
@@ -89,9 +89,9 @@
     def test_plot_temperature(self):
         """Test that plot_utils.plot_temperature() doesn't bomb"""
 
-        thrm = cr2.Thermal()
-        gov = cr2.ThermalGovernor()
-        data = {"first": [thrm, gov], "second": [thrm, gov]}
+        run1 = cr2.Run(name="first")
+        run2 = cr2.Run(name="second")
+        runs = [run1, run2]
 
-        plot_utils.plot_temperature(data, ylim="default")
+        plot_utils.plot_temperature(runs, ylim="default")
         matplotlib.pyplot.close('all')