Modifying prJpeg to accept binary data strings or files

Also adding prAltJpeg to give the capability of adding alternate
images to pdfs. See ISO32000 8.9.5.4 for more information.
Adding in prJpegBlob
Fixing tabs
Fixing up POD
Added support for grayscale images to prJpeg and prJpegBlob after suggestions from Ingo Lachmann
Removing unneeded prJpegBlob
Update Changes file
Updating for ver 0.36
Removing depricated defined(@array) syntax; Thanks to Nigel Gourlay for pointing this out.
Updating changes
Fixing version number for dev
Fixing up a spelling error in the POD
Bumping dev rev number
Updating copyright info
Fixing license type in metadata