Update to ddox 0.9.20.

There was a missing file in DDOX 0.9.19.
Merge pull request #130 from s-ludwig/master

[trivial] Update to ddox 0.9.20.
fix changed tool

- update to new bugzilla URL

- the automatic redirect escapes and thus breaks the request query_string
Merge pull request #131 from MartinNowak/fixChanged

fix changed tool
Upgrade to the latest DDOX with underscore_file_name_support.
Add a URL translation tool to be used with mod_rewrite.

This tool converts URLs of the form "/library/some/module/SomeSymbol.html" to
"/library/some/module/some_symbol.html", suitable to be used as a
"RewriteMap prg:" script.
Merge pull request #132 from s-ludwig/master

Use new DDOX version to enable support for lower_underscore file names
Do not exclude tango package from compilation

Considering D2 tango uses druntime this is not helpful. Quite the contrary, that force me to use custom rdmd build to test my D1->D2 in-progress ports (which include necessary parts of tango in-line).

I think it is quite reasonable to ask projects using Tango-D2 to specify exclusion manually in their build scripts.
Merge pull request #133 from mihails-strasuns-sociomantic/patch-1

Do not exclude tango package from compilation