2.3 - Bugfixes; german and portoguese translations

= 2.3 =
* Fixed: some translastion would not show up (mainly stats cols header).
* Tweak: minor performance enhancements due to tooltips for posts only
being generated for detailed stats.
* New: German translation (Julian Beck).
* New: Spanish Portoguese (pt_PT, pt_BR) translation (Marco Dantas).
* Fixed: if using names different from their their values for user
roles, clicking on a user role in the Personalize settings box would
always return an empty result.
* Fixed: typo in custom default time range tooltip (*rime range* instead
of *time range*).
* Fixed: grammar mistake in personalize settings box (*payed* instead of
*paid*).
2.3.1 - Private posts counting

2.3.1
* New: possible to include private posts in stats.
* Tweak: improved update method.
* Tweak: updated German translation.