Fix argv parsing
handle special characters from feed's title to filename

add a dependency to unidecode
Update requirements.txt
removed encoding of already encoded feed title

bullet become -
é becomes e
È become e
...
Merge https://github.com/csabahenk/GReader-hoover into pulling-test
Merge pull request #4 from vjeantet/master

handle special characters in feed's label (thanks vjeantet)