Tidy up "wizard.php" XHTML

Added "closehead" variable
Moved LINK to HEAD statement and add TYPE parameter"
Closed HEAD statement manually
Added CDATA sections to SCRIPT tags
Closed INPUT, IMG and BR tags and added ALT parameter to IMG tags
Removed duplicate class in INPUT tag
Updated HTML boolean operators
Merge pull request #538 from ExolonDX/branch_03

Tidy up "wizard.php" XHTML