Initial -01 version.
Added references to ongoing work on coloring prefixes for
a better address selection in the MN. See drafts
[I-D.bhandari-dhc-class-based-prefix]
[I-D.korhonen-6man-prefix-properties]
[I-D.lepape-6man-prefix-metadata]

Also updated the PMIPv6 LR draft to RFC6705.