updating README

A non compiling koan saved when using the method or class argument isn't an issue anymore (it used to not display a failure message, but also not advance in the koans)

README.md

@@ -25,4 +25,3 @@ Developing a Koan:
 Something's wrong:
 ==================
 * If the koans app is constantly timing out compiling a koan, your computer may be too slow to compile the koan classes with the default timeout value. Update the compile_timeout_in_ms property in koans/app/config/config.properties with a larger value and try again.
-* If you're running the koans command with the class and/or method arguments, the app may hang if the class you saved won't compile. Until this is fixed, when you you suspect this is occuring revert to a state the file compiled and try again.