implement .file_contents
HTTP proxy support - closes #52

Delegates to the HTTParty.http_proxy method
Merge pull request #90 from chrisdambrosio/file_contents

implement .file_contents
Merge pull request #91 from chrisdambrosio/proxy_support

HTTP Proxy Support
Save/load shell mode history - closes #79
Merge pull request #92 from chrisdambrosio/shell_history

Save/Load Shell Mode History