ADD: add debug macro utils.

Author: tangqiaoboy

Macros/MacroUtils.h

@@ -0,0 +1,16 @@
+// Author: Tang Qiao
+// Date:   2012-3-2
+//
+// The macro is inspired from:
+//     http://www.yifeiyang.net/iphone-development-skills-of-the-debugging-chapter-2-save-the-log/
+#ifdef DEBUG
+#define debugLog(...) NSLog(__VA_ARGS__)
+#define debugMethod() NSLog(@"%s", __func__)
+#else
+#define debugLog(...)
+#define debugMethod()
+#endif
+
+#define EMPTY_STRING    @""
+
+#define STR(key)          NSLocalizedString(key, nil)

Macros/VersionCompare.h

@@ -1,3 +1,9 @@
+// Author: Tang Qiao
+// Date:   2012-3-2
+//
+// The macro is inspired from:
+//     http://stackoverflow.com/questions/3339722/check-iphone-ios-version
+
 /*
  *  System Versioning Preprocessor Macros
  */ 
@@ -8,7 +14,7 @@
 #define SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(v)     ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending)
 
 /*
- *  Usage sample:
+   Usage sample:
 
 if (SYSTEM_VERSION_LESS_THAN(@"4.0")) {
     ...