Change to use array.sort() to sort categories in friendsInfo.
Fix bug when creating catTransfer array.
Move the process of adding categories '我的好友' to html5qq.lab.js.
Move to getFriendsInfo()
Change HTML5QQ.friendsInfo to dict indexed by uin.
So we don't have to traversal the whole friendsInfo to find out the friend.
Now HTML5QQ.friendsInfo = {
	'categories': [
		{'index', 'name', 'sort', 'friends':[#all friends uin in this categories#]},
		#other categories#,
		...
	],
	'friends': #indexed by uin#
	{
		'category', 'flag',
		'face', 'face_flag', 'nick',
		'markname', 'markname_type',
		'is_vip', 'vip_level'
	}
}
Merge pull request #31 from xndcn/dev

几点小改动