deprecate iOS < 7 and xcode < 6.3 (resolve #4996)

lib/devices/ios/ios.js

@@ -30,6 +30,7 @@ var path = require('path')
   , UnknownError = errors.UnknownError
   , binaryPlist = true
   , Args = require("vargs").Constructor
+  , logCustomDeprecationWarning = require('../../helpers.js').logCustomDeprecationWarning
   ;
 
 // XML Plist library helper
@@ -155,6 +156,13 @@ IOS.prototype.configure = function (args, caps, cb) {
     return cb(new Error(msg));
   }
 
+  if (parseFloat(caps.platformVersion) < 7.1) {
+    logCustomDeprecationWarning('iOS version', caps.platformVersion,
+                                'iOS ' + caps.platformVersion + ' support has ' +
+                                'been deprecated and will be removed in a ' +
+                                'future version of Appium.');
+  }
+
   return this.configureApp(cb);
 };
 
@@ -543,8 +551,18 @@ IOS.prototype.setXcodeVersion = function (cb) {
   xcode.getVersion(function (err, versionNumber) {
     if (err) {
       logger.error("Could not determine Xcode version:" + err.message);
+    } else {
+      var minorVersion = parseFloat(versionNumber.slice(0, 3));
+      if (minorVersion < 6.3) {
+        logCustomDeprecationWarning('Xcode version', versionNumber,
+                                    'Support for Xcode ' + versionNumber + ' ' +
+                                    'has been deprecated and will be removed ' +
+                                    'in a future version. Please upgrade ' +
+                                    'to version 6.3 or higher');
+      }
     }
     this.xcodeVersion = versionNumber;
+    logger.debug("Xcode version set to " + versionNumber);
     cb();
   }.bind(this));
 };