1.4.0

• All backslash in the interpolated path in manifest.mf are replaced by slash
• Two internal configs (internal_command_enabled and experimental_command_enabled) are exposed as public config. They are accessible directly from the built-in config command
• The configuration file search order is changed: first search for env variable [APP_NAME]_CONFIG_FILE, then search for [APP_NAME].json file in working dir, and continue search in parent folder until root folder, finally use the default one in $HOME/.[APP_NAME]/config.json
• Remote repository index now accepts a url of the package. It enables the package provider to distribute packages in different servers.
• Properly handle the command exit code