as discussed, reverted the adition of zlist_curr
Merge remote-tracking branch 'upstream/master'

Conflicts:
	include/zlist.h
	src/zlist.c
Merge remote-tracking branch 'upstream/master'

Conflicts:
	include/zlist.h
	src/zlist.c
merge, conflito resolvido
add zhash support o zsock picture
zlist_item was defined 2 times
fixed segfault
Merge pull request #642 from mosconi/master

add zhash support to zsock picture