Merge pull request #12 from evoskuil/develop

Windows build and packaging updates.
add hash_number which uses bitcoind's uint256
Merge pull request #14 from genjix/uint256

Add hash_number which uses bitcoind's uint256
use boost::dynamic_bitset<uint8_t> to represent stealth prefixes now.
bugfix: hash_number copying hash in reverse + add a unit test
bug from veox: fix for windows hosts files to not crash.