Update calendar

Translated date_lang.php
Merge branch 'master' of https://github.com/Tsume/Project-Otoru
added a translation percentage
Merge branch 'master' of https://github.com/Tsume/Project-Otoru
Updated and translated more things
Merge branch 'master' of https://github.com/Tsume/Project-Otoru
Merge pull request #4 from Dokman/master

Translating into spanish the website: Date_lang