WP
added magic_p2sh_byte args. use NULL for magic_byte and magic_p2sh_byte args and fallback to default
easy way to import bip32 keys into wallet
added example of signing a p2sh 1 PK at a time
fixed docblock
added signing of transaction to bip32 example
Added unittests for testnet support
renamed method 'setMagicByte' to 'setMagicByteDefaults' and '$magic_bytes' to '$magic_byte_presets'
Merge pull request #26 from blocktrail/magic_byte

Magic Byte