Don't trap errors on sendto, these aren't necessarily fatal
Merge pull request #154 from hintjens/master

zbeacon asserts during self-test
Updated NEWS for 1.4.1
Updated version number for 1.4.1
Post-package version bump to 1.4.2
Added zmsg_reset_zero_copy
added zframe_reset_zero_copy selftest
Improve zframe_reset_zero_copy documentation
Merge pull request #155 from ulikoehler/zmsg_reset_zero_copy

Add zframe_reset_zero_copy
Added zframe_new_empty (and corresponding test)
Merge pull request #156 from ulikoehler/zframe_new_empty

Add zframe_new_empty
Added zframe_sendmem + zero-copy version + tests
Added missing header decls from previous pull requests
Fix incorrect return code documentation for zframe_send
Make zsockopt_set_subscribe, ..._unsubscribe and ..._identity take a const char* argument
Merge pull request #158 from ulikoehler/missing_headerdecls

Added missing header decls
Update doc/zframe.txt
Update doc/zsockopt.txt
Merge pull request #157 from ulikoehler/zframe_sendmem

Added zframe_sendmem + zero-copy version + tests
Merge pull request #160 from ulikoehler/zsockopt_const_subscribe

Make zsockopt_set_... take const char* args