as discussed, reverted the adition of zlist_curr
Merge pull request #630 from hintjens/master

Problem: interface iterator isn't simple
Differentiate between OSX and iOS

__APPLE__ is defined for both iOS and OSX.  When compiling for iOS this leads to including crt_externs.h which is not available on iOS.
Merge pull request #631 from aschepis/master

Differentiate between OSX and iOS
Merge pull request #632 from hintjens/master

Added explanation on actors to README
Merge pull request #634 from hintjens/master

Problem: zmsg_send does not work as documented.
Merge pull request #635 from hintjens/master

Problem: zbeacon needs to be actorized
Fix MacOS X compilation - missing newline at end of file
Merge pull request #638 from twhittock/mac-compile

Fix MacOS X compilation - missing newline at end of file
Merge pull request #636 from hintjens/master

New picture message methods for zsock
Merge pull request #639 from hintjens/master

Added support for empty frames in picture messaging
Merge pull request #640 from hintjens/master

More small shifts on containers
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
Casts required to build with msvc
Define in_addr_t on windows.
Merge pull request #641 from jossgray/master

Fix some build issues with msvc
merge, conflito resolvido
add zhash support o zsock picture
zlist_item was defined 2 times