Added deep links for widgets

- Widgets will now open the appropriate DetailView in the app when you tap on them.
  - ...except when they don't. This is still a little buggy. It works correctly when the app is already alive in the background but only works about 75% of the time when the app isn't running yet.
- Unified the loading view into a shared view used in all places requiring loading

TigerDine/Info.plist

@@ -6,6 +6,19 @@
 	<array>
 		<string>dev.ninjacheetah.RIT-Dining.refresh</string>
 	</array>
+	<key>CFBundleURLTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleTypeRole</key>
+			<string>Editor</string>
+			<key>CFBundleURLName</key>
+			<string>dev.ninjacheetah.RIT-Dining</string>
+			<key>CFBundleURLSchemes</key>
+			<array>
+				<string>tigerdine</string>
+			</array>
+		</dict>
+	</array>
 	<key>UIBackgroundModes</key>
 	<array>
 		<string>fetch</string>