Remove Nethack code and replace with git submodule.

[Beakerboy]

Inspect the changes that have already been made to the core files to get it to run on iPhone. Determine which should be sent to core as a pull request and which changed to some sort of linker replaced function.

[Beakerboy]

The win/iphone directory is all custom. Significant changes made to config.c

[Beakerboy]

autokick customization. Opens a window to ask if you want to kick the door
Informing player when climbing stairs and objects are on stairs.

[Beakerboy]

sys.h: seduce is set to 1. This is supposed to be a compile time option, so let's define it when we compile.

[Beakerboy]

will need to run makedefs to create:

• src/vis_tab.c
• include/date.h