[EscrowFactory] Fix solhint maximum line length error

[Solc] Remove external compiler from truffle config

[EscrowFactory] Use type().creationCode to reference escrow bytecode instead of hard-coding

[EscrowFactory] Remove `selfDestruct` from the EscrowFactory

Add EscrowFactoryWithErc20.sol to decouple from EscrowFactory.sol

[Solc] Adds an external truffle compile script

[Tests] Fix tests to work with new determinstic address

[Escrow, Library, Factory] Use CREATE2 for deterministic addresses

[Dependencies] Update npm solc to v0.5.12

Add IEscrow.sol to remove cyclic dependency between EscrowLibrary and Escrow

[Unittest] New unit test for testing withdraw before closing

[EscrowLibrary] Withdraw now requires escrow to be in a CLOSED state

Merge pull request #57 from cwcrypto/travis-ci-status-fix

Fixed travis-ci status indicator

Merge pull request #55 from cwcrypto/oldcomment