v2.0.0-b2: Option to auto-create blockmap.json on /iazip

This update adds a config.yml containing two config options:

• createOnIazip: When set to true, will have the plugin automatically create the blockmap.json file whenever /iazip is being executed.
• verboseEnabled: When set to true, will have verbose mode enabled by default, meaning /iaxpf create will be treated like /iaxpf create --verbose. Note that this also affect the automatic creation process, making it be verbose too.