Add libupipe_nacl and libupipe_ebur128

In libupipe_nacl :

-upipe_display is a pipe which display pictures it receives on google-chrome
using the ppapi.
-upipe_sound is a pipe which play a sound it receives on google-chrome using
the ppapi.
-upipe_filter_ebur128 is a pipe which calcul the loudness of a sound it
 receives and send it to google-chrome using the ppapi.
-upipe_src_tcp_chrome is a pipe which create a tcp socket and connect it,
 then send data it receives as an ouput using the ppapi.
-upipe_src_udp_chrome is a pipe which create an udp socket and bind it,
 then send data it receives as an ouput using the ppapi.

In libupipe_ebur128 :

-ebur128.c, can be used to calculate the loudness of a sound.