moved some files around to conform to python best practicies

--HG--
rename : lib/baker.py => lib/baker/__init__.py
rename : lib/tools.py => lib/baker/tools.py
rename : lib/grid.py => lib/grid/__init__.py
rename : lib/smcqdelaunay.py => lib/grid/smcqdelaunay.py

lib/baker/__init__.py

@@ -1,7 +1,7 @@
 import numpy as np
 import sys
 
-from tools import smberror
+from baker.tools import smberror
 
 def get_phis(X, R):
   """

lib/baker/tools.py

@@ -1,6 +1,9 @@
 import numpy as np
 
 class smberror(Exception):
+  """
+    this is a silly little exception subclass
+  """
   def __init__(self, val):
     self.value = val
   def __str__(self):
@@ -17,5 +20,7 @@ def rms(errors):
   return r
 
 def exact_func(x, y):
+  """
+    the exact function used from baker's article (for testing)
+  """
   return np.power((np.sin(x * np.pi) * np.cos(y * np.pi)), 2)
-  return np.sin(x * np.pi) * np.cos(y * np.pi)

lib/grid/__init__.py

@@ -2,14 +2,14 @@
 
 import sys
 import re
-from collections import defaultdict
+from   collections import defaultdict
 
 import numpy as np
 import scipy.spatial
 
-from baker import run_baker, get_phis
-from tools import exact_func, smberror
-from smcqdelaunay import *
+from baker        import run_baker, get_phis
+from baker.tools  import exact_func, smberror
+from grid.smcqdelaunay import *
 
 class face(object):
   def __init__(self, name):