Wallet scans. Tx Records. Encryption. Mempool filtering.

[presstab]

• Additional filtering of transactions in mempool
  • Check if there are conflicts with any transactions in the mempool that contain zerocoinspend serials or zerocoinmint pubcoins
  • Check pubcoins and serials to see if they have already been used on the blockchain (fixes On block creation: ContextualCheckZerocoinMint: pubcoin xxx was already accumulated in tx #232)
• Additional checks performed in block creation (same checks as were added to mempool)
  • Ensure block time is not out of bounds (fixes CreateNewBlock: TestBlockValidity failed: time-too-old, block's timestamp is too early #231)
• Remove any conflicting zerocoin spends/mint from mempool when a new block is added.
• Replace certain areas using IsInitialBlockDownload() with HeadersAndBlocksSynced().
• Consider certain zerocoinspend as not standard
• Add addresses to transaction records for stealth addresses.
• Better recognition of transaction types for GUI tx records.
• Fix errors that were deleting blockchain zerocoin records when reconsiderzerocoins is used.
• Database information about stealth destinations and fix decryption error caused by previous code (fixes Decryption crash. Assert crypter.cpp 207. #208)
• Fix wallet flags marking outputs as the wrong type.
• Mark RingCT outputs used when rescanning.