Develop tools for a personal knowledge management such as:

• Search, manipulation and aggregation of information
• Information visualization, classification and publication
• Use of plain text files with Markdown syntax
• Information backup and conversion to different types of storage (SQLite, CSV, etc)

• Implement notes subcommand.
• Search and export public notes.
• Use env variable or config file at $HOME to avoid pass the directory each time I run install or index