Pop-Punk is a perplexing realm where embarrassing adolescent whining is barely held in check by frenetic energy; needless to say, it’s a difficult genre to gain respect in. But Boston’s Transit have definitely been trying. Steadily gaining attention in the scene by splicing post-rock instrumentals – a la American Football – with traditional, fists-in-the air pop-punk, this quintet’s newest output is their slickest to date. Keep This To Yourself is cleanly produced and crisply written, giving the album a level of purpose…