Update README.rdoc

correct a few things

README.rdoc

@@ -7,9 +7,8 @@ Very simple & usable Mac OSX FSEvents API
 
 - RubyCocoa not required!
 - Signals are working (really)
-- Tested on MRI 1.8.7 & 1.9.2, JRuby 1.6.3
+- Tested on MRI 1.8.7 & 1.9.3, RBX 2.0.0dev, JRuby
 - Tested on 10.6 & 10.7 (though 10.5 should work just as well)
-- Tested with XCode 3.2.6, 4.0.2, 4.1, 4.2b5
 
 == Install
 
@@ -125,7 +124,7 @@ WARNING: passing in 0 as the parameter to :since_when will return events for eve
 
 == Debugging output
 
-If the gem is installed with the environment variable FWDEBUG set to the string "true", then fsevent_watch will be built with its various DEBUG sections defined, and the output to STDERR is truly verbose (and hopefully helpful in debugging your application and not just fsevent_watch itself). If enough people find this to be directly useful when developing code that makes use of rb-fsevent, then it wouldn't be hard to clean this up and make it a feature enabled by a commandline argument instead. Until somebody files an issue, however, I will assume otherwise.
+If the gem is re-compiled with the environment variable FWDEBUG set, then fsevent_watch will be built with its various DEBUG sections defined, and the output to STDERR is truly verbose (and hopefully helpful in debugging your application and not just fsevent_watch itself). If enough people find this to be directly useful when developing code that makes use of rb-fsevent, then it wouldn't be hard to clean this up and make it a feature enabled by a commandline argument instead. Until somebody files an issue, however, I will assume otherwise.
 
     append_path called for: /tmp/moo/cow/
       resolved path to: /private/tmp/moo/cow