add basic command line call. Parsing not implemnted yet

Strings/main.m

@@ -15,17 +15,30 @@ int main(int argc, const char * argv[])
 
     @autoreleasepool {
 
+        NSString *arg = (argc == 2)? [NSString stringWithUTF8String:argv[1]] : @"--help";
+
+        if ([arg isEqualToString:@"--help"]) {
+            printf("Strings is a tool to convert iOS to Android translations file and vice versa.\nPlease use strings <ROOT URL> to start\n");
+            return 0;
+        }
+
         // insert code here...
         NSLog(@"Starting Strings:");
-        NSString *urlString = [NSString stringWithUTF8String:argv[0]];
-        NSLog(@"Scanning %@", urlString);
+
+        NSURL *url = [NSURL URLWithString:arg];
+        if (!url){
+            printf("The directory provided is not valid. Exiting\n");
+            return 0;
+        }
+
+        printf("Scanning %s\n", url.absoluteString.UTF8String);
 
 
 
         ZFStringScanner *scanner = [[ZFStringScanner alloc] init];
-        [scanner scanStringsAtURL:[NSURL URLWithString:urlString]];
+        [scanner startScanAtURL:url];
 
-        NSLog(@"Done, exiting");
+        printf("Nothing Done. Exiting\n");
 
     }
     return 0;