update README to explain tests and code coverage report
Merge pull request #172 from ryanxcharles/feature/code-coverage-update

update README to explain tests and code coverage report
size tests working!!! :D
fix negative number arithmetic!
refactor int conversion, encoding, and utils
some invalid script tests working
invalid script test passing!
fix for firefox
uncomment some test cases!
fix Transaction#create tests
Merge pull request #169 from maraoz/feature/add-bitcoin-core-tests

add bitcoin core ScriptInterpreter valid/invalid script tests
add isScript to Address
add base58key tests for Address case
complete base58_keys_valid tests
refactor valid b58 tests
should generate from hex added
add hex generation of addresses test
fix skipped Opcode test
fix Address validation issue
fix private key validation and base58 invalid tests