[109] +Added initial dummy files from [107]
* [109] rename files to correct ones and links on index.php
[109] * FINALIZED.
[109] *fix some layout issues: multiply parts are inseparable and some margins.
[109] +adding files "como_usar.txt" and "descricao.txt"
[landing_page] *adding interactive [109 - Maximizando a soma]