loopnz should be loopne

[ghghost]

For consistency with repne.

[mgpleszkoch]

And also for consistency with loope.

[mgpleszkoch]

While we're at it, how about changing pusha to pushaw, and popa to popaw, so that they mirror the pushfw, pushfd, popfw, and popfd instructions.

[ghghost]

The Intel 16-bit mnemonics are simply pusha, popa, pushf, popf. I suggest changing pushfw and popfw to pushf and popf, since udis86 generally follows the Intel mnemonics.

[ghghost]

This is included in issue #17, and is fixed by the fix for that issue.