Add a delete feature

[c3dr0x]

Fix #54

The point is for one user to be able to delete one of its comments.

there is new options :

• canDelete: to allow user to delete
• texts.delete: translation string for delete action

There a new service server side to implement:

• DELETE /api/comments/{uuid}

[rodolpheV]

Found the problem with the delay on deleteing comments:
In component\list\index.js:
Change line 9 from
const TRANSITION_TIMEOUT = 5000;
to
const TRANSITION_TIMEOUT = 300;
It will remove the 5 second delay before delete.
Then in component\list\style.scss:
Add:

.comment-leave {
    -webkit-animation-duration: 0.3s;
    animation-duration: 0.3s;
    -webkit-animation-name: fadeOutRight;
    animation-name: fadeOutRight;
}

It will add a pretty animation like the one on add comment.