acement, HMSO LN IPO's (priced): Cone Midstream (CNNX) 17.5m shares at $22 (above range), Travelport Worldwide (TVPT) 30m shares at $16 (high-end), Vitae Pharmaceuticals (VTAE) 6.88m shares at $8 (below range) IPO's (filed): Exmar Energy Partners (XMLP) files $125M IPO through IN Morgan, BofA, and Citi US Key Resear