Squashed commit of the following:

commit 61914ae1323704d4932e4e37412e29271052f74e
Author: Mario Cuba <mario@mariocuba.net>
Date:   Fri Apr 26 19:57:42 2013 -0430

    Bug prevented the current day to be displayed in the graph.

    Can be seen as "last 7 days without including today".

commit ccebdb401de37e464f82ded1636fa7d47f6851bb
Author: Mario Cuba <mario@mariocuba.net>
Date:   Fri Apr 26 19:33:28 2013 -0430

    Seconds in a day is, unlike you've heard, a constant.

commit 5afc811ef26b3c3f05871135bec2e18d6ff47d5a
Author: Mario Cuba <mario@mariocuba.net>
Date:   Fri Apr 26 19:33:00 2013 -0430

    Change titles of graphs (again)

commit cf31386d6f8634aee1d40bd15af56fee4f7d8dd9
Author: Mario Cuba <mario@mariocuba.net>
Date:   Fri Apr 26 18:57:50 2013 -0430

    Translation of days. Whitespace fixes.

commit 4d5fc2135e54b0ee84327402bac94e7b9b4841e9
Author: Mario Cuba <mario@mariocuba.net>
Date:   Fri Apr 26 18:49:16 2013 -0430

    Tickets from the last 7 days are shown as a graph.

commit 89038cef312970f11bf619f76e052c7e12a3b57d
Author: Mario Cuba <mario@mariocuba.net>
Date:   Fri Apr 26 11:09:07 2013 -0430

    Last 7 days calculated.