remove proto.h include from vim.h
remove stdbool.h include from vim.h and globals.h
move memory.h include to version.c
move ascii.h include out of vim.h
move locale.h include out of vim.h
move sys/select.h include to os_unix.c
move <inttypes.h> include out of vim.h
move wctype.h include out of vim.h
move assert.h include out of vim.h
move stdarg.h include out of vim.h
move errno.h include out of vim.h