* Added script to download all PDFs from the Readmes
* Removed sleep
* Formatting
* Added guard closes and some docs to download script. Added it to scripts folder. Added download script readme. Added section in root readme.
* Removed old download_all.sh
* Added support for specifying which directories you want to download.
* Removed dependency on xargs.
* Changed filename to download.sh. Updated READMEs.
* More README
* Fixed download.sh logic for multiple arguments. Removed Readme section about executing script from anywhere. Updated the parsing of URLs to be more specific.
