Fixed the bug with the reference seperation into sql.
Added the keywording module and fixed a few bugs on converting pdftotext calls.
Fixed a couple of bugs related to downloading PDFs and the name getting extra zero padded.
Added more exception handling to automatically try to redownload badly downloaded pdfs.
Added the classification schemes.
Improved classification module code with generation of data for systematic mapping buble charts.
Refined classification for Q2 on tools