add .gitignore

msext/Class/webCache/NSString+Sha1.h

@@ -0,0 +1,19 @@
+
+#import <Foundation/Foundation.h>
+#import <CommonCrypto/CommonDigest.h>
+
+/**
+ * This extension contains several a helper
+ * for creating a sha1 hash from instances of NSString
+ */
+@interface NSString (Sha1)
+
+/**
+ * Creates a SHA1 (hash) representation of NSString.
+ *
+ * @return NSString
+ */
+- (NSString *)sha1;
+
+
+@end