Update password

Basic validation of form fields (!empty and new passwords match)
Will test if current password matches for this user
Encrypts the new password with the same salt
Feedback provided after change attempt

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@huboard:{"order":15.1875,"milestone_order":34,"custom_state":""}
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add validation here with 
```js
validation: {
  resolve: "validation",
  value: "validationMethodWithABetterName"
}
```