bug fix

Placed Finished message inside while block for proper display of
progress bars for multiple album url's
major update

Added debug flag
Removed multiple album flag
Changed the way you add multiple URLs (./imgur.sh url [url])
Fixed bugs with getopts while loop
Allowed for full word option settings (./imgur.sh --silent)
Changed the way gallery_url is populated, fixing multiple bugs
moved the parsing of folder names to a function.
formatting.