minor README change

Author: quintesse

README.md

@@ -138,10 +138,11 @@ $ jpm run --verbose debug    # Passes '--verbose debug' to the run action
 Actions support several variable substitution features for cross-platform compatibility:
 
 - **`{{deps}}`** - Replaced with the full classpath of all dependencies
-- **`{/}`** - Replaced with the file separator (`\` on Windows, `/` on Unix)
-- **`{:}`** - Replaced with the path separator (`;` on Windows, `:` on Unix)
+- **`{/}`** - Replaced with the file separator (`\` on Windows, `/` on Linux/Mac)
+- **`{:}`** - Replaced with the path separator (`;` on Windows, `:` on Linux/Mac)
+- **`{~}`** - Replaced with the user's home directory (The actual path on Windows, `~` on Linux/Mac)
 - **`{./path/to/file}`** - Converts relative paths to platform-specific format
-- **`{~/path/to/file}`** - Converts home directory paths to platform-specific format
+- **`{./libs:./ext:~/usrlibs}`** - Converts entire class paths to platform-specific format
 
 Example with cross-platform compatibility:
 
@@ -152,9 +153,11 @@ actions:
   test: "java -cp {{deps}}{:}{./target/classes} org.junit.runner.JUnitCore TestSuite"
 ```
 
-### Performance Optimization
+NB: The `{{deps}}` variable substitution is only performed when needed - if your action doesn't contain `{{deps}}`, jpm won't resolve the classpath, making execution faster for simple actions that don't require dependencies.
 
-The `{{deps}}` variable substitution is only performed when needed - if your action doesn't contain `{{deps}}`, jpm won't resolve the classpath, making execution faster for simple actions that don't require dependencies.
+NB2: These actions are just a very simple convenience feature. For a much more full-featured cross-platform action runner I recommend taking a look at:
+
+ - [Just](https://github.com/casey/just) - Just a command runner
 
 ## Installation