• Breaking change CallBuilder.stream now reconnects when no data was received for a long time.
  This is to prevent permanent disconnects (more in: #76).
  Also, this method now returns close callback instead of EventSource object.
• Breaking change Server.loadAccount now returns the AccountResponse object.
• Breaking change Upgraded stellar-base to 0.6.0. ed25519 package is now an optional dependency. Check StellarSdk.FastSigning variable to check if ed25519 package is available. More in README file.
• New StellarTomlResolver class that allows getting stellar.toml file for a domain.
• New Config class to set global config values.