replace psutil.disk_usage with shutil.disk_usage (#8)

catcli/noder.py

@@ -7,7 +7,7 @@ Class that represents a node in the catalog tree
 
 import os
 import anytree
-import psutil
+import shutil
 import time
 
 # local imports
@@ -214,8 +214,8 @@ class Noder:
     def storage_node(self, name, path, parent, attr=None):
         '''create a new node representing a storage'''
         path = os.path.abspath(path)
-        free = psutil.disk_usage(path).free
-        total = psutil.disk_usage(path).total
+        free = shutil.disk_usage(path).free
+        total = shutil.disk_usage(path).total
         epoch = int(time.time())
         return anytree.AnyNode(name=name, type=self.TYPE_STORAGE, free=free,
                                total=total, parent=parent, attr=attr, ts=epoch)

requirements.txt

@@ -1,3 +1,2 @@
 docopt; python_version >= '3.0'
 anytree; python_version >= '3.0'
-psutil; python_version >= '3.0'

setup.py

@@ -41,7 +41,7 @@ setup(
 
     keywords='catalog commandline indexer offline',
     packages=find_packages(exclude=['tests*']),
-    install_requires=['docopt', 'anytree','psutil'],
+    install_requires=['docopt', 'anytree'],
 
     extras_require={
         'dev': ['check-manifest'],