By Caroline Valetkevitch NEW YORK (Reuters) – The safe-haven Japanese yen fell slightly against the dollar on Friday, pulling back after recent gains, but remained up for the week as a series of developments in the Ukraine-Russia crisis put investors on edge. On Friday, Russian-backed separatists in eastern Ukraine said they planned to evacuate their breakaway region’s residents to Russia, while U.S. Secretary of State Antony Blinken said the events transpiring in the border area over the past two days are part of a Russian scenario to create false provocations. News late Thursday that Blinken…