Added Deferred 0.6.1.
Core: moved register() to a lib.
Fix buggy model.set method
Revert "Fix buggy model.set method - see https://github.com/devo-ps/carcass/commit/edca176aa7da158d84ac998fac768fa9aa87c42e#commitcomment-2583348"

This reverts commit edca176aa7da158d84ac998fac768fa9aa87c42e.
Register: added debug output.
Merge pull request #23 from devo-ps/master

Sync with master
Core: moved mixable to a lib.
Core: moved mixable to plugins.
Core: added deferred to carcass core; also exposed a promise with carcass itself as the resolve value.
Merge pull request #24 from devo-ps/promise

Promise
Release 0.3.0.
Added carcass.httpError().
Updated package keywords and url.
Merge pull request #25 from devo-ps/error

Error
Release 0.3.1.
Expose Express.
Added a test case for carcass.httpError().
replace _ to typeof for check source type
add proper error msg

add proper error msg & change test case
change proper error msg