Sentence restructure and grammar fix (#188)

There are helpers function != There are helper functions. Great repo.

README.md

@@ -86,8 +86,8 @@ fmt.Println("ip has value ", *ip)
 fmt.Println("flagvar has value ", flagvar)
 ```
 
-There are helpers function to get values later if you have the FlagSet but
-it was difficult to keep up with all of the flag pointers in your code.
+There are helper functions available to get the value stored in a Flag if you have a FlagSet but find
+it difficult to keep up with all of the pointers in your code.
 If you have a pflag.FlagSet with a flag called 'flagname' of type int you
 can use GetInt() to get the int value. But notice that 'flagname' must exist
 and it must be an int. GetString("flagname") will fail.