Very few Irish music festivals are imbued with the sheer independent spirit and passion for homegrown sounds that continues to set Co. Wicklow’s KnockanStockan Festival apart. Set to return to Blessington Lakes this weekend with a host of the country’s very finest artists in tow (full line-up below), Mike McGrath Bryan chats to Bettine McMahon and Graham Sharpe, festival director and music director of KnockanStockan, about their humble beginnings, the festival’s annual schedule, only booking Irish acts and what the future holds. Photos by Moira Reilly. Hi guys. Give us some insight to the beginnings and roots of Knockanstockan. Bettine:…