Removing unnecessary files

Signed-off-by: Miguel Satte Alam Lisboa <miguellisboa@gmail.com>
Update Bootstrap framework to version 3.1

Signed-off-by: Miguel Satte Alam Lisboa <miguellisboa@gmail.com>
Update navigation bar

Signed-off-by: Miguel Satte Alam Lisboa <miguellisboa@gmail.com>
Update on the icons section

Signed-off-by: Miguel Satte Alam Lisboa <miguellisboa@gmail.com>
Update on the footer section

Signed-off-by: Miguel Satte Alam Lisboa <miguellisboa@gmail.com>
Added css styles to mobile devices

Signed-off-by: Miguel Satte Alam Lisboa <miguellisboa@gmail.com>
Fix in css code of '.os-section' class

Signed-off-by: Miguel Satte Alam Lisboa <miguellisboa@gmail.com>