Removed use of readAsBinaryString to replace with readAsArrayBuffer

readAsBinaryString is not supported in IE10. This commit removes the use
of that routine and replaces it with readAsArrayBuffer. It also logs a
few extra things to the console.
Had an extra console.log in there by mistake.
Merge pull request #5 from pugwonk/Removing-use-of-readAsBinaryString

Removed use of readAsBinaryString to replace with readAsArrayBuffer