[Twisted-web] Nevow documentation style and other bugs

[Alexey Shamrin]

Hello!

1. I have attached the patch to issue 159 [1]. It fixes the style of
the documentation in nevow-traversal.txt. Please take a look at it and
report if the patch is acceptable. I can make similar patches to the
rest of the documentation.

2. Then, I have found minor bug in nevow.url module. It is described
in issue 165 [2]. Patch included.

3. There is still a bug in the Directory example in
nevow-traversal.txt. Take a look at issue 158 [3]. I have made a
patch, but I am not sure if it is okay.

Thank you!

[1] http://divmod.org/users/roundup.twistd/nevow/issue159
[2] http://divmod.org/users/roundup.twistd/nevow/issue165
[3] http://divmod.org/users/roundup.twistd/nevow/issue158

-- 
Best regards,
Alexey.