Bootstrap updated from 3.0.2 to 3.0.3

Signed-off-by: Kresimir Nikolic <kresimir.nikolic@gmail.com>
variables.less updated to match the Bootstrap 3.0.3

in /static-html/ index.html renamed to grid.html

Signed-off-by: Kresimir Nikolic <kresimir.nikolic@gmail.com>