Add xmlns:kvg="" to all <svg> elements

Merge pull request #504 from shinjikuriy/fix-group-hierarchies

Fix group hierarchies

Fix to match 09a42, 06ef2, 06158, 08518, 09c3a

From 1c51da1#diff-a774b31b234cf1ffede127cceba5208c35ef6c13a660ec111c322a7b8aece661

Strokes/groups in 0756b-Kaisho.svg

Strokes/groups in 0756b-Kaisho.svg

Merge pull request #418 from sebimoe/feature/python3-kanji-lookup

Added python3 support, added lookup utility

Reversed strokes fixed in various cases

Merge pull request #352 from KanjiVG/contig

Join needlessly-separated groups

Merge pull request #127 from siikamiika/fixes

073cd: swap original/element for group 1

Merge pull request #117 from leoboiko/master

kvg:element="冫": add  kvg:original="氷"