Fix negative latency printing underflow
Move all testing commands into debug API prefix
Print # of imported keys on bitcoin wallet import
Merge branch 'master' of github.com:BitShares/bitshares_toolkit

Conflicts:
	libraries/blockchain/include/bts/blockchain/block_record.hpp
Merge branch 'master' of github.com:BitShares/bitshares_toolkit
execute_command_line -> debug_execute_command_line
Fix compiler warning