Clean up IOWrapper library.
Clean up IOWrapper library.

Changed the 'createFromString' method to work with existing file on the
local filesystem, created a new method 'createFromUrl' to handle the
processing of remote files.

riyan8250/stapler,neerajgoyal12/stapler,simudream/stapler,oschettler/stapler,AndreasHeiberg/stapler,CodeSleeve/stapler,sonuku/stapler,aozisik/stapler,InMoji/stapler,flaxandteal/stapler