Who: Melvins / Retox Where:  US and Canada (including stops in Vancouver, Portland, San Francisco and New York) When: July 1 to July 20 Melvins Lite ("the fifth side of the four-sided Melvins triangle", according to Buzz Osbourne) are hitting the road this summer in support of their debut Freak Puke. Melvins labelmates Retox will join…