With its open-’til-late art galleries,  strategically placed, graze-as-you-go food trucks,  copious watering holes, and scattered sound scapes, NELA Second Saturday has long been one of the best ‘hood parties in town.    The pub/grub/gallery crawl just got art-world-serious, though, with the arrival of  “A Voyage of Growth and Discovery”:  the multi-media installation by artists Michael Smith and Mike Kelly, based in the latter’s studio at the Farley…