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
core: remove includes in .cpp, if header is already in .h

- example: if util.h includes stdint.h, remove it from util.cpp, as
  util.h is the first header included in util.cpp
orphan spaces cleanup ;-)
Merge pull request #3258

fabba0e orphan spaces cleanup ;-) (Philip Kaufmann)
Remove Wallet Tools

We already have the exact same funtionality in /contrib/bitrpc/bitrpc.py

If we really do need standalone scripts, then I'll write something to
pull it from that file, rather than having duplicate code.

Forgot to remove wallet tools from index.

Wallet Tools Follow Up Info
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)
[Qt] use GUIUtil::setClipboard() where possible
Merge pull request #3268

79fac3f [Qt] use GUIUtil::setClipboard() where possible (Philip Kaufmann)
doc: small doxygen update

I was merging change this every time before generation of
the doxygen developer docs (https://dev.visucore.com/bitcoin/doxygen/)
but there's no reason why it can't just be merged upstream.
qt: show all units in send confirmation

Make users accustomed to the other subdivision units (mBTC, muBTC)
by showing the total amount in all units in the confirmation dialog.

This was recently raised on the mailing list and could be a preparation
for switching over the default unit eventually.
Add additional data update to release-process.md

This adds https://github.com/bitcoin/bitcoin.org/pull/270 to the to-do
list for each release, avoiding future situations like
https://bitcointalk.org/index.php?topic=336042.0.
Coincontrol cleanup (e.g. add missing license)

- add missing license headers
- make compatible with Qt5
- enforce header cleanup style
- small code style cleanups
- rename Coin Control dialog into Coin Control Address Selection
- use default font for the windows labels (no monospace)