Description
***********

It is an enhancement of MutableMapping based on Traits (Mixins).
 It currently only offers:
 
* addition;
* substraction;
* multiplication;
* division.

Last but no least, it is fun.

Resource
********

Ticketing: https://github.com/jul/archery/issues?state=open
Source: https://github.com/jul/archery
Latest documentation: http://archery.readthedocs.org/en/latest/index.html
