Release page: https://github.com/stellar/js-stellar-sdk/releases/tag/v0.6.0
* *Breaking change* `CallBuilder.stream` now reconnects when no data was
received for a long time. This is to prevent permanent disconnects (more
in: #76 <https://github.com/stellar/js-stellar-sdk/pull/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.
