[debian] Add depends on libjs-underscore for pycassa-doc

Fix lintian warning « embedded-javascript-library »
for usr/share/doc/pycassa-doc/manual/_static/underscore.js
Refer to Debian Policy Manual section 4.13 (Convenience copies of code)
[debian] wrap and sort d/control file
[debian] Add registration into doc-base

possible-documentation-but-no-doc-base-registration
[debian] Add myself as uploader and update changelog
Merge pull request #232 from sbadia/debian

Update for debian release