Various small tweaks intended with memory management in mind.
Use APIBaseURL instead of hardcoded address whenever possible.
Increase timeout value to 60 seconds.

http://forums.cocoaforge.com/viewtopic.php?t=26167&p=136680
Fix an omission in french translation
Fix problems in french version of Info window

(Inversion in SNDisclosableView arrows, and truncated labels)
Need to increase timeout with Facebook again

I hope 180 seconds is enough...
Workaround for issue #166 : plugins opening an URL operate in a new, foreground tab.
Less ambiguous translation of feed "validate" in French ("Vérifier" instead of "valider")
Update PSMTabBarControl with my own universal architecture build (tagged vienna3.0.0beta)
Use the "Unified" style for tabs bar.
Detect authentication failure
Leopard (Safari < 5.1) does not support the box-sizing CSS property ; for similar effect, it requires the -webkit-box-sizing property
Align the Tyger Graphite style with the Default style (use gradient image).
Check if we are ready before a feed refresh ; detect obsolete token after feed refresh.
Workaround for Macintosh wake up after a sleep : the NSTimers used for tracking the lifetime of Google's tokens were out of touch after sleep.
Make sure articles will not mix.
Added a vertically centered NSTextFieldCell subclass.

Class inspired by http://www.red-sweater.com/blog/148/what-a-difference-a-cell-makes and http://stackoverflow.com/questions/1235219/is-there-a-right-way-to-have-nstextfieldcell-draw-vertically-centered-text
Use vertically centered text cell for the progress cell.

Related to issue #174
Use also vertically centered cells for other columns of article list.

Issue #174
Merge pull request #172 from barijaona/bugfixes