Add ctor and allocate using a T* buffer to dtkVector
Add ctor and allocate using a T* buffer to dtkVector

d-tk/dtk,d-tk/dtk,d-tk/dtk,rdebroiz/dtk,d-tk/dtk,NicolasSchnitzler/dtk,rdebroiz/dtk,rdebroiz/dtk,NicolasSchnitzler/dtk,d-tk/dtk,NicolasSchnitzler/dtk,rdebroiz/dtk,d-tk/dtk,NicolasSchnitzler/dtk