Centralise path configuration into a single file.

Path configuration was distributed throughout wicd, making it difficult
to move around project files. Centralise the configuration into
wpath.py.

wpath.py

@@ -0,0 +1,31 @@
+"""Path configuration and functions for the wicd daemon and gui clients.
+
+chdir() -- Change directory to the location of the current file.
+
+"""
+
+import os
+
+# The path containing the wpath.py file.
+current = os.path.dirname(os.path.realpath(__file__)) + '/'
+
+# These paths can easily be modified to handle system wide installs, or
+# they can be left as is if all files remain with the source directory
+# layout.
+lib = current
+images = lib + 'images/'
+encryption = lib + 'encryption/templates/'
+bin = current 
+etc = current + 'data/'
+networks = lib + 'encryption/configurations/'
+log = current + 'data/'
+
+def chdir(file):
+    """Change directory to the location of the specified file.
+
+    Keyword arguments:
+    file -- the file to switch to (usually __file__)
+
+    """
+    os.chdir(os.path.dirname(os.path.realpath(file)))
+