WIP: improvements to author/title classifiers, by using scikits-learn. Still not
ready for Prime Time, however.

Document deletion via `skid rm ...` improved. No longer need to pass path to
cached file. If you do, that behavior is preserved (and a bit faster). If you
don't a query is issued. If a unique hit is returned a dialogue asks if you'd
like to delete the hit.
update gscholar script.
()
tweaks to gschlar script

 - use argparse instead of optparse.

 - cleanup pylint warnings by using a main function.

 - change format of file names {first author}{two-digit year}{first word of title}.pdf

Clean-up gitignore file

added gscholar.py as a script, which will get installed along-side skid :-D Horray!
WIP: pdf hammer.
improvemnts to pdf hammer script
pdf-hammer now script. added additional checks / error messages.
resurrect bibkey search
tweaks to OCR scripts to make them more user-friendly.
added OCR scirpts to setup and renamed them.
use PNG instead of JPG.
cleanup list of available commands.

added path.py as a dependency in setup.py
()
tweak in order to use new pdfminer (they had a non-back compat change to interal module structure)
()
Merge pull request #1 from timvieira/master

latest from Tim