Fixed tag name, from 'description lists' to 'definition lists'

http://www.w3.org/TR/html401/struct/lists.html#h-10.3
Fixed tag name, from 'description lists' to 'definition lists'

http://www.w3.org/TR/html401/struct/lists.html#h-10.3
Merge pull request #81 from lexander/patch-2

Fixed tag name, from 'description lists' to 'definition lists'
Merge pull request #80 from lexander/patch-1

Fixed tag name, from 'description lists' to 'definition lists'
Edited text for consistency.
Tweak formatting and <a href>s from wordsmithing pass