v0.7.5.17 Release

Major Feature Additions:
Proof of Stake blocks are now are eligible for Proof of Transaction
Interchangeable theme system.
Theme supports menu header and menu icons
debug log tails when opened in gui

Minor Feature Additions:
Wallet address cleanup options (delete unused addresses)
Startup -synctime option
RPC addnode
RPC getaddednodeinfo

Bug Fixes:
Try more than the first address for a DNS -addnode
Make ThreadOpenAddedConnections2 exit quicker if(GetNameProxy())
Use a copy in place of mapMultiArgs["-addnode"]
memory leak
modernizing treatment of transactions
drop release times for CNode
P2P: improve RX/TX flow control
Prevent socket leak in ThreadSocketHandler
remove an assignment which is never used
Make explicitly requested salvage operations continue if error
fix displaying of staking state and try to sync first
Wallet: optimize rescan to skip blocks prior to birthday
Remove unused includes of boost lexical_cast
treat not accepted tx as inactive
append "source: generated" to stake transactions
fix periodical gui lag
transactionrecord modification to handle PoS changes
transactiondetail cleanup
rpc updates to listtransactions, getbalance and wallet functions getamounts to handle PoS changes