Split MIN_PROTO_VERSION into INIT_PROTO_VERSION and MIN_PEER_PROTO_VERSION

INIT_PROTO_VERSION is the initial version, after a succesful version/verack it is increased to a negotiated version.
MIN_PEER_PROTO_VERSION could be a different value to disconnect from peers older than a specified version.
[Qt] Rework of payment request UI (mainly for insecure pr)

- this shows insecure (unsecured) payment requests in a new yellowish
  colored UI (based on the secure payment request UI) instead of our
  normal payment UI
- allows us to receive paymentACK messages for insecure payment requests
- allows us to handle expirations for insecure payment request
- changed walletmodel, so that all types of payment requests don't touch
  the addressbook
payment-request UI: use SendCoinsRecipient.message for memo
make processPaymentRequest() use a single SendCoinsRecipient

- as one this pulls main purpose is to change a payment request to
  be displayed as a single sendcoins entry
rework an ugly hack in processPaymentRequest()

- use a QStringList to store valid addresses and format them for GUI and
  debug.log usage via .join()
Check integrity of gitian input source tarballs
Skip comparison tool on win32 since Wine breaks it
No more fHaveGUI

No more specific handling of GUI in bitcoin core.
Replace the last usage of fHaveGUI with a fForceServer
parameter on AppInit2.
qt: add license header to source files

Closes #839
Make time facet non-constant
Merge pull request #3197 from laanwj/2013_11_qt_license

qt: add license header to source files
Merge pull request #3198 from nvmd/compile_on_mavericks

Make time facet non-constant
Merge pull request #3196 from laanwj/2013_11_nohavegui

No more fHaveGUI
qt: remove unused signal from addresstablemodel
[Qt] use tr() instead of QObject::tr() in intro.cpp
[Qt] remove unused optionsmodel from addressbookpage
Merge pull request #3205 from Diapolo/intro

[Qt] use tr() instead of QObject::tr() in intro.cpp
Merge pull request #3206 from Diapolo/addressbookpage_model

[Qt] remove unused optionsmodel from addressbookpage
[Qt] make event() and eventFilter() in askpassphrasedialog protected
Merge pull request #3145

395d0d5 rework an ugly hack in processPaymentRequest() (Philip Kaufmann)
952d2cd make processPaymentRequest() use a single SendCoinsRecipient (Philip Kaufmann)
983cef4 payment-request UI: use SendCoinsRecipient.message for memo (Philip Kaufmann)
c6c97e0 [Qt] Rework of payment request UI (mainly for insecure pr) (Philip Kaufmann)