STOCK PURCHASE AGREEMENT BY AND AMONG AKOUSTIS, INC., AKOUSTIS TECHNOLOGIES, INC., JOE COLLINS, LAILA HAQ COLLINS, SAIRA Y. HAQ, TRUSTEE, NON-EXEMPT MARITAL TRUST CREATED MAY 26, 2006 UNDER THE TERMS OF THE HAQ LIVING TRUST DATED APRIL 12, 1989,...