Improving Stake issues, Add libzerocoin QT, RPC

Add libzerocoin
Add -mininput=value option
Fix known adressbook bugs
Store reserved Balance in global Var
Show reserve Balance in GUi
Add RPC command get staking info
Try to SYnc before staking
Fixed Bitcoin #3162 https://github.com/bitcoin/bitcoin/pull/3162
Version Update to block all old versions
Updates
remove backups
recommit
comit
Revert "comit"

This reverts commit be54859906c30d09f23557bb44edd3bb7ba7aad2.
Revert "recommit"

This reverts commit 909f21756a7bbd39508e7318f7f6409c14a9458a.
Revert "remove backups"

This reverts commit 94f27ca356a600ff593dd7dd0f096a52e24a22ed.
Revert "Updates"

This reverts commit 9f0b08e887733480c6d5259edf6e419479927e5d.
Revert "Version Update to block all old versions"

This reverts commit 56cfb5bfbb463032d9372a4a34852039a9c3fea8.
Revert "Improving Stake issues, Add libzerocoin QT, RPC"

This reverts commit 2429ee26b6126887e3ad65328e0bae278cb4b11b.