[svn r37741] monster checking for

* unifying IO capturing methods
* py.io.StdCapture and py.io.StdCaptureFD
  (and both have a classmethod 'call' that is
  a shortcut for capturing output while
  executing a function)
* removing lots of duplicate code
* providing some examples in py/doc/io.txt

at least tests on win32 and linux seem
to pass all for me.

--HG--
branch : trunk

py/log/testing/test_log.py

@@ -1,7 +1,8 @@
 import py
-from py.__.misc.simplecapture import callcapture
 import sys
 
+callcapture = py.io.StdCapture.call
+
 def setup_module(mod): 
     mod.tempdir = py.test.ensuretemp("py.log-test") 
     mod.logstate = py.log._getstate()