static void propsErr()
    {
        System.err.println("\nError parsing the properties file ...");

        System.err.println("\nThe properties file would look like:");
        System.err.println("modules = foo");
        System.err.println("foo.source = path/to/your/proto/file/or/dir");
        System.err.println("foo.output = java_bean");
        System.err.println("foo.outputDir = src/main/java");
        System.err.println("foo.encoding = UTF-8");
        System.err.println("foo.options = key1:value1,key2:value2");
    }
The main execution point of compiling protos.

@author David Yu
@created Jan 5, 2010
protostuff-compiler/src/main/java/io/protostuff/compiler/CompilerMain.java