tests: remove outdated FIXME in wallet
test: rephrase fail -> throw
Merge pull request #247 from dcousens/ecurve

Removal of secure-random in favour of crypto-browserify
tests: avoid unnecessary sha256 for hash
Transaction: deprecate Tx signing methods
TxBuilder: Initial commit and tests
TxBuilder: use data fixtures for invalid tests
TxBuilder: transform all signatures once
Wallet: use TxBuilder instead
TxBuilder: fix missing code path
TxBuilder: add pubKey test fixture
TxBuilder: add invalid nulldata case
TxBuilder: sign after error checking
TxBuilder: remove unnecessary assert
index: add TransactionBuilder
tests: integration test to use TxBuilder
tests: bitcoin-core to use non-deprecated Tx API
Transaction: avoid double-up on deprecation warning
tests: add description for TxBuilder
TxBuilder: add sequence number passthrough