forklift: update homepage URL and tweak formatting

plugins/forklift/README.md

@@ -4,10 +4,12 @@ Plugin for ForkLift, an FTP application for OS X.
 
 ### Requirements
 
-* [ForkLift](http://forkliftapp.com/forklift/)
+* [ForkLift](http://www.binarynights.com/forklift/)
 
 ### Usage
 
-* If `fl` is called without arguments then the current folder is opened in ForkLift. Is equivalent to `fl .`
+<code>fl [*file_or_folder*]</code>
 
-* If `fl` is called with a directory as the argument, then that directory is opened in ForkLift
+* If `fl` is called without arguments then the current folder is opened in ForkLift. This is equivalent to `fl .`.
+
+* If `fl` is called with a directory as the argument, then that directory is opened in ForkLift. If called with a non-directory file as the argument, then the file's parent directory is opened.