Clarify that libiconv is not needed on Linux.

Closes #73.

readme

@@ -118,8 +118,9 @@ And to compile libiconv on windows you can do the following:
   4. now you can compile using the MSVC project file
 
 On Linux the program currently builds only in root's home directory.
-There is no installation step available yet, so you will need to copy the
-program to a directory in your PATH, such as /usr/local/bin on most Linux
+You do not need to manually build the libiconv program.  There is no
+installation step available yet, so you will need to copy the program
+to a directory in your PATH, such as /usr/local/bin on most Linux
 installations. To compile on Linux use a sequence like this: 
   1.  sudo su -
   2.  Enter password if needed