add nonstd space group 'C c c m' to list, fix testMagSym & testSSSymbols to run in new G2 system

Author: vondreele

GSASII/GSASIIspc.py

@@ -4176,6 +4176,7 @@ def GetHallSpaceGroup(SGData):
         'I m a 2','I 2 m b','I c 2 m','I m 2 a','I b m 2','I 2 c m',
         'I m m m','I b a m','I m c b','I c m a',
         'I b c a','I c a b',
+        'I c c m','I m a a','I b m b',
         'I m m a','I b m m ','I m c m','I m a m','I m m b','I c m m',),
     'Fmmm':('F 2 2 2','F m m m', 'F d d d',
         'F m m 2','F m 2 m','F 2 m m',

GSASII/testMagSym.py

@@ -1,13 +1,20 @@
 #testMagSym
 import sys
+import os
 import wx
 import numpy as np
 import copy
-from . import GSASIIpath
+import importlib.util
+try:
+    importlib.util.find_spec('GSASII.GSASIIGUI')
+except ModuleNotFoundError:
+    print('GSAS-II not installed in Python; Hacking sys.path')
+    sys.path.insert(0,os.path.dirname(os.path.dirname(__file__)))
+from GSASII import GSASIIpath
 GSASIIpath.SetBinaryPath()
-from . import GSASIIspc as G2spc
-from . import GSASIIctrlGUI as G2G
-from . import GSASIIphsGUI as G2phsGUI
+from GSASII import GSASIIspc as G2spc
+from GSASII import GSASIIctrlGUI as G2G
+from GSASII import GSASIIphsGUI as G2phsGUI
 
 try:
     wx.NewId

GSASII/testSSymbols.py

@@ -1,10 +1,17 @@
 #test
 import sys
+import os
 import wx
-from . import GSASIIpath
+import importlib.util
+try:
+    importlib.util.find_spec('GSASII.GSASIIGUI')
+except ModuleNotFoundError:
+    print('GSAS-II not installed in Python; Hacking sys.path')
+    sys.path.insert(0,os.path.dirname(os.path.dirname(__file__)))
+from GSASII import GSASIIpath
 GSASIIpath.SetBinaryPath()
-from . import GSASIIspc as G2spc
-from . import GSASIIctrlGUI as G2G
+from GSASII import GSASIIspc as G2spc
+from GSASII import GSASIIctrlGUI as G2G
 
 try:
     wx.NewIdRef