modularized list method

README.md

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+# Orvani Tagger
+
+(From עוֹרְבָנִי, the Hebrew name for th Eurasian Jay)
+
+Platform independent, folder-based, and portable tagging system for organizing and searching files. The command line interface and organizing principles are heavily inspired by the todo.txt standard. 
+
+Every file can be assigned projects, contexts, and tags and have a descriptive note.
+
+Exactly like tasks in todo.txt, files can be categorized by freely defined contexts, defined by the
+`@` prefix or projects, defined by the `+` prefix. In addition, the `#` prefix defines hashtags that can be assigned.
+
+So a as an example an audio-file could be assigned to project `+album` and have a context of `@drums` and tagged with `#boombap`, `#lofi`, `#snare`. It's completely up to you how you use the different means of categorization.
+
+## Command Line Tool
+
+### Assigning Contextual Tags
+
+Let's
+```
+$ orvani add <file/path> [contextual tags ...]
+```
+
+Removing contextual tags from a file
+```
+$ orvani remove <file/path> [contextual tags ...]
+```