Identity Monad transformer and monad for Akh Javascript monad library

API

``js
// Identity monad
require('akh.identity').Identity
require('akh').Identity

// Identity monad transformer
require('akh.identity').IdentityT
require('akh').IdentityT
`

#### require('akh.identity').Identity
Identity monad.


#### require('akh.identity').IdentityT`
Identity monad transformer. Transforms a monad to itself.