Cleaned up the Util path normalization.
Cleaned up the Util path normalization.

farmisen/flysystem,barryvdh/flysystem,dshafik/flysystem,mhlavac/flysystem,sohelrana820/flysystem,hannesvdvreken/flysystem,CarsonF/flysystem,dstockto/flysystem,mapyo/flysystem,oswaldderiemaecker/flysystem,twistor/flysystem,Amrit01/flysystem,sachintaware/flysystem,nao-pon/flysystem,rossriley/flysystem,twistor/flysystem,mhlavac/flysystem