[Pythoncard-users] updated findfiles sample

I changed the load and save file methods in findfiles to use binary reads
and writes to avoid any cross-platform issues when sharing .grep files. I
removed the trailing tab when saving a .grep file (that was a bug). I
updated the code so that it automatically saves the last search parameters
used in a findfiles.grep file. If 'findfiles.grep' is available when the app
starts, then it is automatically loaded, so you can quickly change a
parameter and do another search without having to go through a File->Open
operation.

ka