Document new options (#37)

Author: staabm

README.md

@@ -34,6 +34,12 @@ Run one of the following commands within your GithubAction workflow:
 vendor/bin/cs2pr /path/to/checkstyle-report.xml
 ```
 
+### Available Options
+
+- `--graceful-warnings`: Don't exit with error codes if there are only warnings
+- `--colorize`: Colorize the output. Useful if the same lint script should be used locally on the command line and remote on Github Actions. With this option, errors and warnings are better distinguishable on the command line and the output is still compatible with Github Annotations
+
+
 ## Pipe the output of another commmand
 
 ... works for __any__ command which produces a checkstyle-formatted report.