Create identity

[ilanolkies]

Removes old implementation, I created a simpler one now. It includes:

• A reducer that stores identities, with add identity action and identities selector
• Two operations. Init that MUST be triggered when the lib is initialised. It loads all stored identities into the reducer. Create is used to create identities.
• An identity store that can be used as base of a bigger store.
• Some minor docs, I will extend it when we get into more definitions

[jessgusclark]

This is great! I was able to create an identity with this.

[ilanolkies]

Perfect! Let's add the operations too.

• IMHO delete one identity should use DAF delete identity and then trigger the action
• Delete all should Promise all deletions and trigger actions?
• Also, IMHO mnemonic deletion should be triggered "manually" because it is also "manually created". I mean, not in delete all identities

[ilanolkies]

Addition:

• Operations allow optional callback parameter. A callback is a closure that takes (res, err) collaborations. If the operation is succesfull the closure is executed with (res, undefined) but if it fails it is executed with (undefined, err). Correct usage of callback would be as follows

  operation(...args, (res, err) => {
    if (err) return handleError(err)
    return handleSuccess(res)
  })

[ilanolkies]

Researched a little bit on callbackify and fount Node.js implementation https://nodejs.org/dist/latest-v8.x/docs/api/util.html#util_util_callbackify_original. I swapped the parameter order to make it more developer familiar. Now it is used

operation(...args, (err, res) => {
  if (err) return handleError(err)
  return handleSuccess(res)
})

[jessgusclark]

Great!