vl_plotframe.m: improves doc
vl_plotframe.m: improves doc

erexhepa/vlfeat,cvfish/vlfeat,richarddzh/vlfeat,rxl194/vlfeat,j-bo/vlfeat,qubick/vlfeat,j-bo/vlfeat,CansenJIANG/vlfeat,richarddzh/vlfeat,rxl194/vlfeat,WangDequan/vlfeat,cvfish/vlfeat,CansenJIANG/vlfeat,cvfish/vlfeat,hongzhili/vlfeat,vlfeat/vlfeat,cvfish/vlfeat,hongzhili/vlfeat,CansenJIANG/vlfeat,vlfeat/vlfeat,erexhepa/vlfeat,rxl194/vlfeat,CansenJIANG/vlfeat,mylxiaoyi/vlfeat,erexhepa/vlfeat,rxl194/vlfeat,richarddzh/vlfeat,mylxiaoyi/vlfeat,qubick/vlfeat,erexhepa/vlfeat,hongzhili/vlfeat,mylxiaoyi/vlfeat,richarddzh/vlfeat,vlfeat/vlfeat,hongzhili/vlfeat,cvfish/vlfeat,j-bo/vlfeat,qubick/vlfeat,richarddzh/vlfeat,CansenJIANG/vlfeat,erexhepa/vlfeat,erexhepa/vlfeat,vlfeat/vlfeat,hongzhili/vlfeat,j-bo/vlfeat,WangDequan/vlfeat,qubick/vlfeat,WangDequan/vlfeat,mylxiaoyi/vlfeat,WangDequan/vlfeat,CansenJIANG/vlfeat,qubick/vlfeat,richarddzh/vlfeat,j-bo/vlfeat,qubick/vlfeat,WangDequan/vlfeat,WangDequan/vlfeat,cvfish/vlfeat,rxl194/vlfeat,mylxiaoyi/vlfeat,vlfeat/vlfeat,hongzhili/vlfeat,rxl194/vlfeat,mylxiaoyi/vlfeat,vlfeat/vlfeat