Vienotes

* Configuration: add on your local.properties file the key api.access.token="<API_TOKEN>"

* Access Token is re-generated each time that the tasks list are retrieved, username is fixed, API_KEY is on build.gradle at the moment
* No cache used on local storage to save tasks list, so they are retrieved from the server every time
* On task Create & Delete to refresh the list, we call the server
* Task name and note(detail) were considered mandatory     * There is no delete confirmation