-Added 'g' shortcut key that will act as the Gameshark button.
-Added user ability to map a joystick button to the Gameshark button.
Note, I did not add support for the Gameshark button to the emulator core yet, so cheats triggered by the GS button will not work until that's done.
-Removed "Remove All" button from rom browser config tab. There wasn't a stock gtk button for remove all and it didn't really seem necessary since you can select all of the directories and then click the "Remove" button.
-Removed unnecessary callback functions for about dialog, made about dialog not resizable.
-Added new tab to configuration dialog for user to create mappings.
-Minor fix: Reset configuration dialog to have first tab selected everytime it's shown.
-Readded --noask functionality (it was lost during gui/nogui merge).
-Added config dialog checkbox to toggle noask setting.
-Fixed problem with too many dialog windows when loading a bad dump or hacked rom.