enhance figleaf setup, enabled by default now (requires --figleaf). Generalize internal ability to show "hints" at the end of "-h".

--HG--
branch : trunk

testing/plugin/test_pytest_figleaf.py

@@ -2,16 +2,16 @@ import py
 
 def test_functional(testdir):
     py.test.importorskip("figleaf")
-    testdir.plugins.append("figleaf")
     testdir.makepyfile("""
         def f():    
             x = 42
         def test_whatever():
             pass
         """)
-    result = testdir.runpytest('-F')
+    result = testdir.runpytest('--figleaf')
     assert result.ret == 0
     assert result.stdout.fnmatch_lines([
         '*figleaf html*'
         ])
     #print result.stdout.str()
+