diff --git a/apps/documents/conf/__init__.py b/apps/documents/conf/__init__.py
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/apps/documents/conf/settings.py b/apps/documents/conf/settings.py
deleted file mode 100644
index d6a1a0fcdd..0000000000
--- a/apps/documents/conf/settings.py
+++ /dev/null
@@ -1,134 +0,0 @@
-"""Configuration options for the documents app"""
-
-import hashlib
-import uuid
-import os
-
-from django.utils.translation import ugettext_lazy as _
-from django.conf import settings
-
-from storage.backends.filebasedstorage import FileBasedStorage
-from smart_settings.api import Setting, SettingNamespace
-
-
-def default_checksum(x):
-    """hashlib.sha256(x).hexdigest()"""
-    return hashlib.sha256(x).hexdigest()
-
-
-def default_uuid():
-    """unicode(uuid.uuid4())"""
-    return unicode(uuid.uuid4())
-
-
-namespace = SettingNamespace('documents', _(u'Documents'), module='documents.conf.settings', sprite='page')
-
-# Saving
-
-Setting(
-    namespace=namespace,
-    name='CHECKSUM_FUNCTION',
-    global_name='DOCUMENTS_CHECKSUM_FUNCTION',
-    default=default_checksum,
-)
-
-Setting(
-    namespace=namespace,
-    name='UUID_FUNCTION',
-    global_name='DOCUMENTS_UUID_FUNCTION',
-    default=default_uuid,
-)
-
-# Storage
-
-Setting(
-    namespace=namespace,
-    name='STORAGE_BACKEND',
-    global_name='DOCUMENTS_STORAGE_BACKEND',
-    default=FileBasedStorage,
-)
-
-# Usage
-
-Setting(
-    namespace=namespace,
-    name='PREVIEW_SIZE',
-    global_name='DOCUMENTS_PREVIEW_SIZE',
-    default=u'640x480',
-)
-
-Setting(
-    namespace=namespace,
-    name='PRINT_SIZE',
-    global_name='DOCUMENTS_PRINT_SIZE',
-    default=u'1400',
-)
-
-Setting(
-    namespace=namespace,
-    name='MULTIPAGE_PREVIEW_SIZE',
-    global_name='DOCUMENTS_MULTIPAGE_PREVIEW_SIZE',
-    default=u'160x120',
-)
-
-Setting(
-    namespace=namespace,
-    name='THUMBNAIL_SIZE',
-    global_name='DOCUMENTS_THUMBNAIL_SIZE',
-    default=u'50x50',
-)
-
-Setting(
-    namespace=namespace,
-    name='DISPLAY_SIZE',
-    global_name='DOCUMENTS_DISPLAY_SIZE',
-    default=u'1200',
-)
-
-Setting(
-    namespace=namespace,
-    name='RECENT_COUNT',
-    global_name='DOCUMENTS_RECENT_COUNT',
-    default=40,
-    description=_(u'Maximum number of recent (created, edited, viewed) documents to remember per user.'),
-)
-
-Setting(
-    namespace=namespace,
-    name='ZOOM_PERCENT_STEP',
-    global_name='DOCUMENTS_ZOOM_PERCENT_STEP',
-    default=50,
-    description=_(u'Amount in percent zoom in or out a document page per user interaction.'),
-)
-
-Setting(
-    namespace=namespace,
-    name='ZOOM_MAX_LEVEL',
-    global_name='DOCUMENTS_ZOOM_MAX_LEVEL',
-    default=200,
-    description=_(u'Maximum amount in percent (%) to allow user to zoom in a document page interactively.'),
-)
-
-Setting(
-    namespace=namespace,
-    name='ZOOM_MIN_LEVEL',
-    global_name='DOCUMENTS_ZOOM_MIN_LEVEL',
-    default=50,
-    description=_(u'Minimum amount in percent (%) to allow user to zoom out a document page interactively.'),
-)
-
-Setting(
-    namespace=namespace,
-    name='ROTATION_STEP',
-    global_name='DOCUMENTS_ROTATION_STEP',
-    default=90,
-    description=_(u'Amount in degrees to rotate a document page per user interaction.'),
-)
-
-Setting(
-    namespace=namespace,
-    name='CACHE_PATH',
-    global_name='DOCUMENTS_CACHE_PATH',
-    default=os.path.join(settings.PROJECT_ROOT, 'image_cache'),
-    exists=True
-)
diff --git a/apps/mimetype/icons.py b/apps/mimetype/icons.py
new file mode 100644
index 0000000000..10b0e71810
--- /dev/null
+++ b/apps/mimetype/icons.py
@@ -0,0 +1,7 @@
+from __future__ import absolute_import
+
+from icons.literals import FILE_EXTENSION_ERROR, FILE_EXTENSION_UNKNOWN, ICON_SET_CUSTOM
+from icons import Icon
+
+icon_file_extension_error = Icon(FILE_EXTENSION_ERROR, ICON_SET_CUSTOM)
+icon_file_extension_unknown = Icon(FILE_EXTENSION_UNKNOWN, ICON_SET_CUSTOM)
diff --git a/apps/mimetype/registry.py b/apps/mimetype/registry.py
new file mode 100644
index 0000000000..36983ab2d3
--- /dev/null
+++ b/apps/mimetype/registry.py
@@ -0,0 +1,10 @@
+from __future__ import absolute_import
+
+from django.utils.translation import ugettext_lazy as _
+
+from .icons import icon_file_extension_unknown
+
+label = _(u'MIME types')
+description = _(u'Handles the MIME type detection.')
+icon = icon_file_extension_unknown
+dependencies = ['app_registry', 'icons']