ENH/API: allow DataFrame constructor to better accept list-like collections (GH3783,GH4297)
closes #3783
closes #4297
related to #2305 (as now accept GeneratorType), but just convert to list, don't incrementally create the frame

@jtratner that worked....now not dependent on the type per se only that its list-like and 1dim
 @jtratner @cpcloud ?
 :+1: 
