Implement setup_plugin command (#18)

Fix unzipping issue (#17)

Fix unzipping issue (#16)

Fix a bug (#15)

Fix a bug (#14)

Fix a bug (#13)

* Fix a bug

* Fix a bug

Fix a bug (#12)

Fix a bug (#11)

Fix a bug (#10)

* Add a new command: trb new theme theme-name that uploads and unzips the theme

Add download theme command (#9)

* Add a new command: trb new theme theme-name that uploads and unzips the theme