Add cross-compile capability on Windows with OpenWatcom and mingw32-make
(Remove dependance on 16bit DOS executables when building)
Fix build break on DOSish buildenv
Fix pointer of DBCS table (int 0x21, func 0x6300)
Enable to load DBCS table from COUNTRY.SYS
Merge pull request #1 from lpproj/prototype

Cross-build on Windows and DBCS fix