Merge pull request #3 from kayanalmeida/master

Utilizando o estilo nos novos inputs; inserindo o datetimepicker e forma...
Storages an empty json in file if it is outdated by more than one hour.
Warns user if system is down + outDatedGps function bug fix for past jsons + dealing with empty jsons in data + small fixes
example of storaged empty json
Adding callback to our api url
Percentual of each generated report + number of jsons used per report
downloadable csv + small fixes
Hiding response when changing forms
Adicionando animação de loading; Modificando a resposta; Inserindo radio mais claro;