Added notEqualsString operation for "if" markers, for convenience.

git-svn-id: http://svn.cocoasourcecode.com/MGTemplateEngine@71 fad7f400-0e54-0410-bf1d-e368f886e4d4

MGTemplateStandardMarkers.m

@@ -389,7 +389,7 @@ - (NSObject *)markerEncountered:(NSString *)marker withArguments:(NSArray *)args
 					argTrue = (num1 <= num2);
 				} else if ([op isEqualToString:@"\%"]) {
 					argTrue = ((num1 % num2) > 0);
-				} else if ([op isEqualToString:@"equalsstring"]) {
+				} else if ([op isEqualToString:@"equalsstring"] || [op isEqualToString:@"notequalsstring"]) {
 					NSObject *firstVal = [engine resolveVariable:firstArg];
 					NSObject *secondVal = [engine resolveVariable:secondArg];
 					if (!firstVal) {
@@ -401,6 +401,9 @@ - (NSObject *)markerEncountered:(NSString *)marker withArguments:(NSArray *)args
 					if (firstVal && secondVal) {
 						//NSLog(@"%@ %@", [NSString stringWithFormat:@"%@", firstVal], [NSString stringWithFormat:@"%@", secondVal]);
 						argTrue = [[NSString stringWithFormat:@"%@", firstVal] isEqualToString:[NSString stringWithFormat:@"%@", secondVal]];
+						if ([op isEqualToString:@"notequalsstring"]) {
+							argTrue = !argTrue;
+						}
 					}
 				}
 			}