cli.md in roger-1.7.0

- old
+ new
@@ -50,6 +50,17 @@
 
 ```
 Options:
   -v, [--verbose]  # Set's verbose output
   -h, [--help]  # Help
-```
+```
+
+## Custom options
+
+All processors/middleware/etc. can use custom options. Roger will parse any leftover option that starts with `--` and sets it in the `project.options` hash. It even supports setting nested keys by using `:` as a separator. This means that `--release:rsync:disable=true` will become: `{release: { rsync: { disable: true}}}` in the options hash.
+
+### Parsing
+The commandline parser will work with flags in the following formats:
+
+* `--key` will just set the flag to `true`
+* `--key=value` and `--key value` will set the key `:key` to `"value"`
+* `--key=true` and `--key=false` will convert to boolean `true` and `false`
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