Issue #18: Improved the colouring for the listing output

* Library name is now yellow and the URL red.
* Also removed the `libpage==None` condition as I don't see under
  which circumstances there would not be a `libpage`.
Make the display of libpage links more robust.

Also the libname is now displayed bright when using
colorama.
White space pet peave
Merge pull request #56 from dietmarw/t18-enhanceFormatting

Issue #18: Improved the colouring for the listing output