Owlmixin

:new: New features

* OwlObjectEnum (See [pydoc](https://github.com/tadashi-aikawa/owlmixin/blob/master/owlmixin/owlenum.py#L21))

New features

* Add `emap` ([doc](http://owlmixin.readthedocs.io/en/stable/api/owlcollections.html#owlmixin.owlcollections.TList.emap))
* Add `partial` ([doc](http://owlmixin.readthedocs.io/en/stable/api/owlcollections.html#owlmixin.owlcollections.TList.partial))
* Add argument `first` which can select concat direction ([doc](http://owlmixin.readthedocs.io/en/stable/api/owlcollections.html#owlmixin.owlcollections.TList.concat))

First major version release!!