TODO:

key: + = to add, - = to remove, x = completed, # = comment

xAppend extensions to file name in save dialog unless exists
+Add option for multiple audio formats
+Dynamic libraries
+Create custom url entry dialog
xUrl validation
+Percentage in progress bar
+Replace spaces in file name with dashes/underscores
+Make cancel button exit in url dialog
+Create dialog asking to play finished file or not
+Display current action in progressbar instead of youtube link itself
+Fix progress bar cancel button
#possibly more later