Manicube, a New York-based company that brings 15-minute manicures to offices, has received $5 million in investment capital that will help it expand to more cities. The series A funding round was led by Bain Capital Ventures, along with participation from existing investors, including F Cubed. Manicube, launched in 2012, says its mission is to make the lives of working women easier by bringing 15 minute, high-quality manicures to busy professionals weekly at their corporate office. The company,…