Path with spaces

[Amaneusz]

Does not work when the pdf path or name contains spaces in it.
For directory the walk around would be simply
dir.split(' ').join('\\ ')
but same trick won't work when the filename contains a space.

[marxys]

Quoting path work too. My pull request fix it : #19

[fitraditya]

I updated this module related to file name that contains a space.