encode/decode BinaryIllustrations as Base64
 add library files to convert base64 to file
added bianryilluistratio extends illustration; switched audio over for now as test
need to checkSIDconflict when getstory from ES as binary files are downloaded at this point; need to still add in view button functionality to remove these files when done
add classpath for fileutils
audio and image inherit from binary illustrations
merging
Merge branch 'base64'