install.sh now working and installing all dependencies

install.sh:
- xpdf no longer installed
- pdfminer now downloaded from github

pdfreader/main.py:
- added support for jpeg images instead of converting from ppm to png(incomplete)

psdtools/main.py:
- added progression prints

readme:
- addded unzip in install chapter

Signed-off-by: Mickael <mickael@beingenious.com>