Potentially fix door redraw bug.
Actually fix door redraw bug
Add platform-native save dialogue boxes for character dumps and other things which prompt for a file to save to on OS X.
Add note telling user where character dump is going to be saved to in text mode.
OS X: Don't set the Angband creator code for text files because Angband doesn't open text files.
Delete the remnants of the SDL/Win/X11 font-based solid walls
Remove old sound set, replace with Dubtrain's (encoded as high-quality VBR MP3).
Fix up previous commit