Fix running for real this time (doh!)

Windows-specific fixes:

- Fix running bug (see_wall() was not using an unsigned char, which broke checks for wall character values >127)
- In non-roguelike mode, make keypad Ins key always act as a number zero '0' key (this is a user-requested deviation from the original DOS implementation)
- Remove non-Windows-specific code from Windows flavor of ms_misc.c.

Merge branch 'master' into msvc

use TERM=pcansi instead of TERM=cygwin to eliminate artifacts when ru…

…ning from a Windows command prompt

Version 5.6 source from Beej

Get Cygwin build working outside of Cygwin environment

Version 5.5.2 source from Beej

Version 5.5.1 source from Beej

Version 5.5 source from Beej

Version 5.4 source from Beej