Add package mpg123

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Add libnut package and use it for ffmpeg

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
sdl2: disable DirectInput because of missing wbemcli.h
Merge pull request #247 from robn/sdl2

package sdl2: disable DirectInput because of missing wbemcli.h
Merge pull request #248 from TimothyGu/master

Add two packages
package ffmpeg: add libnut dependency
package zziplib: enable mmap support
package poppler: fix update macro