added function to try to get author link into nav menu. to be fixed.
Added profile button to wp_nav_menu
Ensured that nav menu works

Function ivanhoe_make_menus now checks to see if the menu exists and if
the menu has content. Fixes error.
If the nav menu exists, kill it and recreate it.

Also, I got rid of trailing whitespace everywhere.
Added conditional statement to nav menu

Added a check to ensure that a user is logged in before displaying the
'profile' button on the nav menu.
profile link now directs to author.php page.