upgrade layout

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
update default navigation bar

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
correct github plugin

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
complete correction of github plugin

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
add glyphicon for loading

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>