Updated pom.xml and Readme for Glowkit.
Don't display blank help topics. Fixes BUKKIT-5623

Help topics previously would display nothing if there was no text defined.
This can cause communication problems to end users if they simply see a
blank area instead of some text to indicate status.

This commit solves the communication problem
Fix chat paginator wrapping words incorrectly. Fixes BUKKIT-5408

There are issues with the word wrapping calculations currently available.
They can be activated as follows:

- If 'lineLength - line.length() - word.length() == 0' then the 'word'
  will be appened to 'line' without a proper space between them.
  This can be triggered with the following: wordWrap("preciselytwenty-five
  chars and more!", 25);

- Color codes do not correctly wrap. A specific example is
  wordWrap(ChatColor.GOLD + "foo", 3);

This commit solves the issues described above and adds added unit tests to
ensure regression does not occur.
Improve whitelist command messages. Fixes BUKKIT-5427

The whitelist command's output is not very helpful to the user if there
are no whitelisted players or if the user tried to add/remove someone who
is already (not) on the whitelist.

This commit resolves the behaviour and provides better output to the user
for the actions described. This is purely cosmetic and does not adjust the
functionality of the whitelist.