Bitsv

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- Fixed documentation --> now hosted on gh-pages at https://austecon.github.io/bitsv/
- Added "confirmations" field back into Unspents / UTXOs
- Fixed tests --> achieving coverage of 87% (needs new tests for new features added recently)
- Fixed badges on ReadMe for coverage: https://codecov.io/gh/austecon/bitsv and travis CI: https://travis-ci.org/AustEcon/bitsv

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- **New Feature**: Added Hierarchical deterministic wallet support (in bip32.py).

- Can use xprv key to generate Electrum SV or Handcash list of address / private key pairs
- Can use xpub key to generate list of addresses for viewing only

- Added BitIndex functions for dealing with extended public keys

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- PyPi ReadMe rendering issues.

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- Default fee set to 1 sat/byte for all transaction types.
- Updated ReadMe to include changes in 0.5.4 and updated examples.

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- Added 100kb OP_RETURN capability (fixed a bug).
- Fixed currency conversion courtesy "http://bitcoinsv-rates.com/api/rates/" api.
- Fixed issue with different APIs getting utxos out of sync with rapid transaction broadcasting.
- Fixed some tests and removed deprecated ones.

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- Port code base over to Bitcoin SV
- Allow raw byte string to be used as transaction OP_RETURN
message. Increase message maximum OP_RETURN size to 220 bytes.
- Add a get_transaction() function to network services that
returns an instance of a new Transaction class which
contains some common details of the transaction.