Fix typo "informations"

There is no such thing as "informations" in English.
See http://www.englishtown.it/community/channels/article.aspx?articlename=117-5mis

Just did a global search and replace with "information"

Signed-off-by: Gianpaolo Macario <gmacario@gmail.com>
Merge pull request #50 from gmacario/fix-informations

Fix typo "informations"