[GNC] defining key strokes

[Ken Farley]

Turns out MacOS shows directories with specific cases, but if you cd 
down one with different case characters it kind of does an "alias on the 
fly". If I cd using "GNUCASH" or "GNUcash" or whatever mix of characters 
I chose (i.e. "GnUcAsH") it will cd into the directory just fine and 
spit back the new character string if I issue a "pwd" command. MacOS has 
apparently changed what I considered normal behavior, likely to 
accommodate someone, maybe Windows users? I don't know. Weird.