give README DOS/Windows-style line endings
add version history to README
adjust for AutoIt v3.2.12.0

This version of AutoIt made script-breaking changes to GUI include
files.  More details here:

http://www.autoitscript.com/forum/topic/70902-how-to-convert-gui-scripts-to-v32120/

Thanks to AutoIt Forums user "ptrex" for initially providing the
corrected #include lines:

http://www.autoitscript.com/forum/topic/22490-find-classes-by-text/#entry623888