CEDAR RAPIDS — The Iowa Startup Accelerator has begun its fifth year of fostering young businesses with an expansion of its program to organizations in the not-for-profit realm.The Accelerator, a part of the New Bohemian Innovation Collaborative, welcomed the first set of start-ups into its 2018 class Monday. The class includes four businesses and one not-for-profit, GSI Works, which is the test participant in NewBoCo’s new Social Good Accelerator — an attempt to bolster the growth of not-for-profits.