timestamps management : created_at and updated_at

[Nwenn]

Respond to #23

[Flynsarmy]

What was the purpose behind removing the trim functionality?

[Nwenn]

Oups ! It's a mistake !!!

[Nwenn]

Oups ! It's a mistake !!!
Sorry, this is the first time I'm doing a pull request.

(sorry for my English)

[Flynsarmy]

One other minor change before I can merge: If created_at or updated_at columns already exist, don't overwrite them. Something like this:

                $new[$key] = $item;
                if ( !isset($new[$key]['created_at']) )
                    $new[$key]['created_at'] = \Carbon\Carbon::now();
                if ( !isset($new[$key]['updated_at']) )
                    $new[$key]['updated_at'] = \Carbon\Carbon::now();

Thoughts?

[Nwenn]

Why not, but is it worth the cost ? There is already the option to say whether we add them automatically or not.

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[Flynsarmy]

Added in 92acae3