Fix uninitialized constant error

Error was:
~/.gem/ruby/gems/confluence-client-0.0.8/lib/confluence-client.rb:126:in `initialize': uninitialized constant Confluence::Client::OpenSSL (NameError)
        from ./confluence.rb:17:in `new'
        from ./confluence.rb:17:in `<main>'
Merge pull request #2 from herrphon/bugfix

Fix uninitialized constant error