A few minor changes.

Move w.cmp() from “core” to “math”. “arrays” now depends on “math”.
Add "objects" module.

Add “objects” module. And move w.deepcopy() from “types” to “objects”.
A few interface changes.
Remove QUnit test cases.
Add Mocha test cases.
Remove underscore dependency in "arrays".
Fully compatible with underscore v1.7.0.

Overwrite no functions of underscore. And print warnings if a function
of warmsea is not fully compatible with an underscore function of the
same name.
#noConflict()