Backport doc fixes and 2.4-only -m safety check to 0.6 branch

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4045791

EasyInstall.txt

@@ -545,9 +545,7 @@ The current analysis approach is fairly conservative; it currenly looks for:
  * Possible use of ``inspect`` functions that expect to manipulate source files
    (e.g. ``inspect.getsource()``)
 
- * Any data files or C extensions (this restriction will be removed in a future
-   release, once the ``pkg_resources`` runtime has been hardened for multi-user
-   environments)
+ * Top-level modules that might be scripts used with ``python -m`` (Python 2.4)
 
 If any of the above are found in the package being installed, EasyInstall will
 assume that the package cannot be safely run from a zipfile, and unzip it to

setuptools/command/bdist_egg.py

@@ -393,7 +393,7 @@ def scan_module(egg_dir, base, name, stubs):
                 log.warn("%s: module MAY be using inspect.%s", module, bad)
                 safe = False
     if '__name__' in symbols and '__main__' in symbols and '.' not in module:
-        if get_python_version()>="2.4":
+        if sys.version[:3]=="2.4":  # -m works w/zipfiles in 2.5
             log.warn("%s: top-level module may be 'python -m' script", module)
             safe = False
     return safe