Log Message:
Update ruby-rest-client to 2.0.1.

* Update HOMEPAGE.

2.0.1.

* Warn if auto-generated headers from the payload, such as Content-Type,
  override headers set by the user. This is usually not what the user wants to
  happen, and can be surprising. (#554)
* Drop the old check for weak default TLS ciphers, and use the built-in Ruby
  defaults. Ruby versions from Oct. 2014 onward use sane defaults, so this is
  no longer needed. (#573)