Merge parsing functions into the retrieval loop
removed rendundant progress bar increment
remove redundant script
add a global variable to set the output file path
Add description of image url
Update README to reflect merged scripts
clarify commenting
Store IDs and attribute headings as symbols instead of strings
Merge branch 'unify'

Unifies the scraping and parsing functions within one script, so users
do not have to needlessly download a large HTML file.