added rename method to system file class
added rename method to system file class

BenaroyaResearch/bripipetools,jaeddy/bripipetools,BenaroyaResearch/bripipetools,BenaroyaResearch/bripipetools,jaeddy/bripipetools,jaeddy/bripipetools,BenaroyaResearch/bripipetools,jaeddy/bripipetools