setup: undo the previous patch to quote the executable in scripts

The problem isn't in the script, it is in the cli.exe script that is built by setuptools. This might be related to
http://bugs.python.org/issue6792
and
http://bugs.python.org/setuptools/issue2
Or it might be a separate issue involving the launcher.c code e.g. http://tahoe-lafs.org/trac/zetuptoolz/browser/launcher.c?rev=576#L210 and its handling of the interpreter name.

setup.py

@@ -240,7 +240,7 @@ class MakeExecutable(Command):
         f = open(bin_tahoe_template, "rU")
         script_lines = f.readlines()
         f.close()
-        script_lines[0] = '#!"%s"\n' % sys.executable
+        script_lines[0] = "#!%s\n" % sys.executable
         tahoe_script = os.path.join("bin", "tahoe-script.py")
         f = open(tahoe_script, "w")
         for line in script_lines: