Removed selftest of deprecated wrap/unwrap
Fixed memory overread in chunk_load
Minor cleanups
Removed custom frame API

- deprecated by zproto, which is better for real protocols
Removed non-portable includes
Merge pull request #403 from hintjens/master

Removed custom zframe API
Updated AUTHORS from git log
Updated NEWS for 4.1.0
Merge pull request #404 from hintjens/master

Updated AUTHORS from git log
Bumped version for 2.2.0
Was not packaging model scripts properly
Merge pull request #405 from hintjens/master

Bumped version for 2.2.0
Updated man pages
Merge pull request #406 from hintjens/master

Updated man pages
Merge branch 'master', remote-tracking branch 'upstream/master'