added README

README.md

@@ -0,0 +1,26 @@
+# open
+
+This is a Rust rewrite of my `open` script from my shell scripts. It's written to be faster and more customizable; it now features "local" configs and a zero-operand command, allowing the user to specify how files should be opened differently, and for opening a project, etc.
+
+For example, for
+
+```ini
+[open]
+# zero-operand command
+command = atom .
+
+[.md]
+command = typora
+
+[.rs]
+command = atom
+
+[filename:.gitignore]
+command = vim
+shell = true
+```
+
+I can use `open` to open the directory in Atom, or I could use `open src/main.rs` to open `main.rs` in Atom, and I can specify these on a per-project basis.
+
+For directories with a local config, any missing values will be filled in by the global config (`~/.config/open.conf`), which means local configs can be shorter.
+