Improve "cook" to try loading littlechef module with "import" first.

This makes it possible to run "cook" from a source code checkout without
installing the package first, which simplifies installation and development.
All previous trickery to load the module is retained and will be used as
a fallback.

cook

@@ -1,16 +1,21 @@
 #!/usr/bin/env python
+import re
 import sys, os
 from subprocess import call
 from distutils.sysconfig import get_python_lib
 
-fabfile = get_python_lib() + "/littlechef.py"
-
-if not os.path.exists(fabfile):
-    fabfile = fabfile.replace('/usr/lib/', '/usr/local/lib/')
+fabfile = None
+try:
+    import littlechef
+    fabfile = re.sub(r'\.pyc$', '.py', littlechef.__file__)
+except ImportError:
+    fabfile = get_python_lib() + "/littlechef.py"
     if not os.path.exists(fabfile):
-        fabfile = __file__.replace('EGG-INFO/scripts/cook', '') + 'littlechef.py'
+        fabfile = fabfile.replace('/usr/lib/', '/usr/local/lib/')
         if not os.path.exists(fabfile):
-            sys.exit("There was an installation error. Couldn't find littlechef.py, try reinstalling again")
+            fabfile = __file__.replace('EGG-INFO/scripts/cook', '') + 'littlechef.py'
+            if not os.path.exists(fabfile):
+                sys.exit("There was an installation error. Couldn't find littlechef.py, try reinstalling again")
 
 args = ['fab', '-f', fabfile]