Remove hardwired --silent from make, change verbosity for linux/clang.
Merge pull request #148 from evoskuil/version2

Remove hardwired --silent from make, change verbosity for linux/clang.
Enable conditional warning flags by compiler.
Merge pull request #149 from evoskuil/version2

Enable conditional warning flags by compiler.
Merge pull request #147 from libbitcoin/base16

Base16
Un-reverse the bitcoin_hash type in memory

With this change, the reversal only takes place in the encode_hash
and decode_hash functions.