raise default difficulty for cleaner start, more informative miner messages

put higher difficulty where it matters

Fix to separate minimum difficulties for primary and alternate algori…

Reduce default difficulty, fix maturity signed vs. unsigned

Continue, rather than quit mining while looking for tip

wait longer to ensure full chain before mining

Better synch display in mining

Improve mining startup and display

Message changes and better startup

Fix incorrect validations of block transactions, more tolerance to block timing variation until we have enough blocks

Enable time locked transactions to be recognized in the wallet

Recognizing CLTV transactions more broadly

Latest Komodo changes, spending time locked coinbases, some cleanup