Add optional URL scheme (opening iAPS from other apps)

(cherry picked from commit 82ac3c9dd714adc2baf20e6dcde5d43518d3149b)

Config.xcconfig

@@ -6,6 +6,7 @@ DEVELOPER_TEAM = ##TEAM_ID##
 BUNDLE_IDENTIFIER = ru.artpancreas.$(DEVELOPMENT_TEAM).FreeAPS
 APP_GROUP_ID = group.com.$(DEVELOPMENT_TEAM).loopkit.LoopGroup
 APP_ICON = pod_colorful
+APP_URL_SCHEME = freeaps-x
 
 #include? "ConfigOverride.xcconfig"
 //#include? "../../ConfigOverride.xcconfig"

FreeAPS/Resources/Info.plist

@@ -37,7 +37,7 @@
 			<string>com.artificial-pancreas-iaps</string>
 			<key>CFBundleURLSchemes</key>
 			<array>
-				<string>freeaps-x</string>
+				<string>$(APP_URL_SCHEME)</string>
 			</array>
 		</dict>
 	</array>