Update Readme

Readme

@@ -1,4 +1,4 @@
-optiLoader.pde
+optiLoader.ino
 
 Copyright (c) 2011 by Bill Westfield ("WestfW")
 Distributed under the terms of the "MIT OSSW License."
@@ -13,7 +13,7 @@ entirely with the Arduino and there is no communications with a host PC
 required, this can procede very rapidly, and is not subject to interference
 of (for example) avrdude with auto-reset.
 
-The internal copies of the bootloader are prepare manually from the .hex
+The internal copies of the bootloader are prepared manually from the .hex
 files compiled in the bootloader directories.  (There's an easy editor macro
 process, but it is manual.)