Release v1.0.0

Code has been functional in production for a good deal of time.
Update Gemfile.lock
Improve Check responses

When checking a single item allow #available? to be called without
arguments. Add #names and #name methods to Host and Domain, #ids and
#id on Contact.
Fix test/helper.rb includes to fix coverage results.
Fix test cases for Ruby 1.8
Add build status to README.md

[ci skip]
Add support for specifying the SSLContext.

This will allow us to use client-side certificates
as required by some registries.
Update README.md to remove pre 1.0.0 API examples.

[ciskip]
Correct examples.

The response from the client methods are bare EPP::Response objects
which then need to passed to parsing object such as
EPP::Domain::CheckResponse.