Update CLI

[oubiwann]

• Get the CLI to use the updated component system
• Get help working again
• Get new post stub working again
• Get running a local web instance running
• Update processing files cmd
• Update regenerating content cmd
• Add new command for re-preocessing a single file
• Add new command for regenerating a single URL's content
• Add new command for reprocessing + regenerating a single file
• Add new command for reprocessing + regenerating all files