Add an implementation for fill_rect
Add an implementation for fill_rect

Again, this is probably incomplete but it'll do for now

splav/servo,saneyuki/servo,DominoTree/servo,DominoTree/servo,splav/servo,nnethercote/servo,splav/servo,DominoTree/servo,splav/servo,larsbergstrom/servo,nnethercote/servo,larsbergstrom/servo,nnethercote/servo,notriddle/servo,paulrouget/servo,DominoTree/servo,KiChjang/servo,DominoTree/servo,notriddle/servo,nnethercote/servo,larsbergstrom/servo,KiChjang/servo,saneyuki/servo,splav/servo,notriddle/servo,DominoTree/servo,KiChjang/servo,DominoTree/servo,larsbergstrom/servo,nnethercote/servo,splav/servo,saneyuki/servo,nnethercote/servo,saneyuki/servo,notriddle/servo,saneyuki/servo,larsbergstrom/servo,notriddle/servo,splav/servo,paulrouget/servo,DominoTree/servo,notriddle/servo,nnethercote/servo,KiChjang/servo,larsbergstrom/servo,paulrouget/servo,splav/servo,paulrouget/servo,paulrouget/servo,larsbergstrom/servo,notriddle/servo,splav/servo,paulrouget/servo,KiChjang/servo,DominoTree/servo,notriddle/servo,saneyuki/servo,paulrouget/servo,nnethercote/servo,paulrouget/servo,KiChjang/servo,saneyuki/servo,nnethercote/servo,splav/servo,paulrouget/servo,KiChjang/servo,paulrouget/servo,KiChjang/servo,larsbergstrom/servo,notriddle/servo,notriddle/servo,KiChjang/servo,saneyuki/servo,larsbergstrom/servo,larsbergstrom/servo,nnethercote/servo,saneyuki/servo,KiChjang/servo,DominoTree/servo,saneyuki/servo