Bitcoin-Qt: comment out unused parameter in addressbookpage
Bitcoin-Qt: never display own block count > estimated block count

- some users reported it as weird, that the estimated block count could be
  lower than our own nodes block number (which is indeed true and not good)
- this pull adds a new default behaviour, which displays our own block
  number as estimated block number, if own >= est. block count
- the pull raises space for nodes block counts in cPeerBlockCounts to 8 to
  be more accurate
- also removes a reduntant setNumBlocks() call in RPCConsole and moves
  initialisation of numBlocksAtStartup in ClientModel, where it belongs
Bitcoin-Qt: add a Reset button to the options dialog

- a click on "Reset Options" sets all options to the default values by
  removing all stored settings (QSettings), loading the defaults and
  saving them as the new settings
- before the reset is executed the user is presented a confirmation dialog
- special casing was needed for StartAtStartup
translations update (bitcoinstrings.cpp + bitcoin_en.ts)
Merge pull request #2141 from Diapolo/translations

translations update (bitcoinstrings.cpp + bitcoin_en.ts)
Merge pull request #1685 from Diapolo/Qt_add_options_reset

Bitcoin-Qt: add a Reset button to the options dialog
Merge pull request #2148 from Diapolo/est_block_count

Bitcoin-Qt: never display own block count > estimated block count
Merge pull request #2110 from Diapolo/addrbook

Bitcoin-Qt: comment out unused parameter in addressbookpage
Bitcoin-Qt: give testnet a unique IPC message queue name

- this prevents an interference with the IPC message queue (which is used
  for URI processing) when running a testnet and mainnet instance in
  parallel
- to check for testnet, I had to raise the ParseParameters() call in
  main() to the topmost position
update noui_ThreadSafeMessageBox function to use strCaption

- ensure we use strCaption for printf and fprintf, as before it could
  happen to have an error message in the debug.log, which had no "Error"
  (or whatever) in front
Bitcoin-Qt: add a Signature label on sign message page
Bitcoin-Qt: fix small stylesheet glitch in overviewpage.ui
Merge pull request #2143 from Diapolo/ThreadSafeMessageBox_caption

update ThreadSafeMessageBox function to use strCaption
Merge pull request #2147 from Diapolo/mq_name_testnet

Bitcoin-Qt: give testnet a unique IPC message queue name
Merge pull request #2151 from Diapolo/signmessage

Bitcoin-Qt: add a Signature label on sign message page
Merge pull request #2153 from Diapolo/overviewpage

Bitcoin-Qt: fix small stylesheet glitch in overviewpage.ui