Add Xcode 4 templates (issue #13)

xcode/readme.txt

@@ -0,0 +1,43 @@
+XCODE 4 TEMPLATES
+=================
+
+These are templates to create easily a new project in Xcode 4. 
+
+Features
+--------
+
+ * You can choose between command line tool or bundle application.
+ * You can select or not each module of SFML you'll use into your project.
+ * A basic example is inserted automatically into your project's code.
+
+Install
+-------
+
+Copy the four folders into ~/Library/Developer/Xcode/Templates folder (you might need to create it first).
+
+Usage
+-----
+
+To use these templates follow these steps :
+
+ * open Xcode 4, 
+ * select «create a new Xcode project» from the «Welcome to Xcode» window or select menu File > New > New Project, 
+ * select «Templates» under «Mac OS X»,
+ * then select either «SFML Application» or «SFML Command Line Tool»,
+ * fill in the requested information and you're done.
+
+Note
+----
+
+If you wish to add/remove any module of SFML from your project without rebuilding a new one follow these steps :
+
+ * select your project from the project navigator panel (cmd+1),
+ * select your project's target on the main area,
+ * go to the «Build Settings» tab,
+ * go down to the bottom,
+ * edit any MODULEX_CONFIG variable (e.g. AUDIO_DEBUG, NETWORK_RELEASE) you want to.
+
+Examples : 
+
+ * to disable the audio module simply erase the content of AUDIO_DEBUG and AUDIO_RELEASE.
+ * to add the network module set NETWORK_DEBUG to '-lsfml-network-d' and NETWORK_RELEASE to '-lsfml-network'.