Fixing a few small bugs in the setup.py scripts. In setupbase.py, in find_scripts, ipython

was spelled as lowercase.  This didn't cause a problem on OS X as it is case insensitive.  But
on Linux, it crashed.  Now ipython is spelled properly as "IPython".  Also, kernel/config/tests
and UserConfig were missing their __init__.py files.  These have been added.

setupbase.py

@@ -175,9 +175,9 @@ def find_scripts():
     Find IPython's scripts.
     """
     scripts = []
-    scripts.append('ipython/kernel/scripts/ipengine')
-    scripts.append('ipython/kernel/scripts/ipcontroller')
-    scripts.append('ipython/kernel/scripts/ipcluster')
+    scripts.append('IPython/kernel/scripts/ipengine')
+    scripts.append('IPython/kernel/scripts/ipcontroller')
+    scripts.append('IPython/kernel/scripts/ipcluster')
     scripts.append('scripts/ipython')
     scripts.append('scripts/pycolor')
     scripts.append('scripts/irunner')