FaviconController: Work without pkg_resources (fixes #4)

If the `pkg_resources` module is not available, the `FaviconController` will
fall back to finding the default image in the same directory on the filesystem
as the `milla` package.

src/milla/controllers.py

@@ -19,13 +19,15 @@ from one or more of these classes can make things significantly easier.
 
 :Created: Mar 27, 2011
 :Author: dustin
-:Updated: $Date$
-:Updater: $Author$
 '''
 
 import datetime
 import milla.util
-import pkg_resources
+import os
+try:
+    import pkg_resources
+except ImportError:
+    pkg_resources = None
 
 
 class Controller(object):
@@ -58,17 +60,23 @@ class FaviconController(Controller):
     EXPIRY_DAYS = 365
 
     def __init__(self, icon=None, content_type='image/x-icon'):
-        if icon:
-            try:
-                self.icon = open(icon)
-            except (IOError, OSError):
-                self.icon = None
-        else:
-            try:
+        try:
+            if icon:
+                self.icon = open(icon, 'rb')
+                self.content_type = content_type
+            elif pkg_resources:
                 self.icon = pkg_resources.resource_stream('milla', 'milla.ico')
-            except IOError:
-                self.icon = None
-        self.content_type = content_type
+                self.content_type = 'image/x-icon'
+            else:
+                icon = os.path.join(
+                    os.path.dirname(milla.__file__),
+                    'milla.ico'
+                )
+                self.icon = open(icon, 'rb')
+                self.content_type = 'image/x-icon'
+        except (IOError, OSError):
+            self.icon = self.content_type = None
+
 
     def __call__(self, request):
         if not self.icon: