Some of the past year’s buzziest new brands—Premme, Eggie, Something Navy—share a surprising common denominator: They’re the design off-shoots of the Internet’s favorite fashion bloggers. And like Nicolette Mason, Gabi Gregg, Jenn Imm, and Arielle Charnas, Julia Engel of Gal Meets Glam is joining the ranks of influencers-turned-designers, with the launch of her debut fashion…