Show of hands: Who here has received the dreaded letter from school advising of a lice invasion? Makes your head itch just thinking about it, right? Go ahead; have a good scratch, this will keep. All good? It’s that time of the year, and for those of us who have school aged children and are meticulously filing the 1001 forms and letters sent home every day — kidding, there’s a pile of papers listing towards the breakfast dishes — it’s the least favourite part of the new school year. …