Transactions

Added Python 3 support.

Read `long_description` from `README.rst`

Add tests and upgrade `pycoin`, `requests`, and `pybitcointools`.

One notable change is that `pybitcointools` is now called `bitcoin`.

Add support for:

| functionality | blockr.io api | jsonrpc bitcoin node |
| --- | :-: | :-: |
| raw response | x | x |
| `decode` | x | |
| `get_block_info` | x | |
| `get_block_raw` | x | |
| `get_balance` | x | |
| `get_new_address` (`getnewaddress`) | | x |
| `send_to_address` (`sendtoaddress`) | | x |

Add aliases for:
- `Transactions.simple_transaction` --< `Transactions.create`
- `Transactions.sign_transaction` --> `Transactions.sign`