Added Travis-CI status
Added Travis-CI status

Former-commit-id: 2aec27156a9ddb8bab201290f9c258e2e68795de
jgraph/draw.io,jgraph/draw.io,jgraph/drawio,jgraph/draw.io,jgraph/draw.io,jgraph/drawio,jgraph/drawio,jgraph/draw.io