DGtal-team/DGtalTools-contrib: Release 0.9.4

DGtalTools-contrib 0.9.4 global Fix for the last QGLViewer version (2.7). (Bertrand Kerautret, #40) visualisation graphViewer: new option to generate edges from vertex points and to customize vertex color (Bertrand Kerautret, #33) Geometry2d LUTBasedNSDistanceTransform: Removed the dependency to libNetPBM. (Nicolas Normand, #32) thresholdRosin: implementation of Rosin's algorithm to compute threshold of an unimodal intensity histogram (Van-Tho Nguyen and Bertrand Kerautret #36) Geometry3d off2sdp: a new tool to convert a mesh into a set of points (.sdp). It can extract the mesh vertices (by default) or the face centers. (Bertrand Kerautret 33) off2obj: tool to convert a mesh represented in off format into obj format. (Bertrand Kerautret, #35