JSON instance for Tx
To/From Json Instances for Outpoint, ScriptOutput and Coin
Added Json Instances for TxHash and Word256. Added Tests for ToJson . FromJson = id
Merge pull request #79 from pernas/json-instances

Json instances
Merge pull request #78 from plaprade/master

Adding a cabal flag for compiling haskoin against testnet
Added (en/de)codeBlockHashLE functions
blank line
Merge pull request #81 from pernas/blockHash

Block hash
Adding constants