configure: lupdate is not needed for Qt build

Don't require lupdate to build with Qt. Like xgettext it is only
needed to update translations, not for normal builds.

This fixes the gitian build (broken by fcfbf547d).
qt: align amounts on overview page to the right

This is more consistent with other places in the GUI.
pass nBytes as parameter to GetMinFee(..)
Coin Control Features
qt: language update from transifex

Adds three new languages:

- de_AT: German (Austria)
- gl: Galician
- sl_SI: Slovenian (Slovenia)

Updates many others.

Thanks to the translators contributing on Transifex!
[Qt] make most Windows appear centered on main GUI

- remove default value for parent variable in dialogs, which should appear
  centered over main GUI and pass appropriate value
- add some addition NULL pointer checks
Merge pull request #3248 from laanwj/2013_11_overviewpage_align

qt: align amounts on overview page to the right
Merge pull request #3252 from laanwj/2013_11_transifex_pull

qt: language update from transifex
orphan spaces cleanup ;-)
Merge pull request #3258

fabba0e orphan spaces cleanup ;-) (Philip Kaufmann)
Merge pull request #3255

309f796 [Qt] make most Windows appear centered on main GUI (Philip Kaufmann)
Merge pull request #3253

6a86c24 Coin Control Features (Cozz Lovan)
8dfd8c6 pass nBytes as parameter to GetMinFee(..) (Cozz Lovan)