Tony Alexander's Weekly BNZ Overview Trans-Tasman Resources gets green light to mine iron sands Zeta, Saville team up for partial takeover of NZ Oil & Gas, offering 72 cents a share Hackers looking to shut down factories for pay Official Cash Rate unchanged at 1.75 percent Labour confirms royalties for bottled water and irrigation schemes Kiwi company Karma Cola goes international New Zealand ranked 30th for Internet download speeds Mondo Travel - Airfare special until seats allocated are sold - Phone: 0800 110 108 Christchurch to Asia & Europe - $100 off…