Better Howdy

Remove and restructure the 'Howdy' line. Props to Ozh for No Howdy. People have always seemed to complain about the 'Howdy' on the admin pages. I personally don't care about the use of the word but think that the 'Howdy area' could be more functional and user friendly.

1.2 (2011-06-11):

• Use a proper filter now that it exists

1.1 (2008-10-17):

• Changes for the ever changing WordPress 2.7

1.0 (2008-10-08):

• Initial Public Release