1) rick wanted me to change the default size of comments to 600

2) Fixed OSQA-146
 - Note: if the user doesn't enter a birthday then when they go back to edit there page the page will display there birthday as "1900-01-01."  This is fairly sloppy and will take a little bit of refactoring to fix.

git-svn-id: http://svn.osqa.net/svnroot/osqa/trunk@83 0cfe37f9-358a-4d5e-be75-b63607b5c754