Applied the corresponding changes to command files.
AMakes it possible to declare and use additional parser inside subparsers.
May be useful for tag command. Will be implemented in texnote plugin.
- Moves shared command code to helpers module.
- Implements reference(s) argument for commands:
+ a helper to add single or multi-reference argument to parser,
+ two functions to transform this argument into a list of citekeys.
- configuration is now referenced in repo object,
- introduces new class PaperInRepo,
- simplifies storage of documents in metadata,
- changes a few names.
