Issue 9

Added methods add, update and remove
Listo, corregido en ambos componentes.

2014-07-01 9:16 GMT-04:00, Yosmany Garcia <notifications@github.com>:
>> @@ -23,4 +25,28 @@ public function pick($criteria);
>>       * @return array The projects
>>       */
>>      public function collect($criteria = null);
>> +
>> +    /**
>> +     * Adds given project
>> +     *
>> +     * @param Project $project
>> +     * @return void
>> +     */
>> +    public function add(Project $project);
>> +
>> +    /**
>> +     * Update given project
>
> `Updates given project`.
>
> ---
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> https://github.com/contrask/project-as-abstract/pull/10/files#r14402633