Markup update to valid formats and fix to include updated download links on version change from dropdown.

filever.php - added w3c complaint script tag markup.

functions.php - added valid script tag markup, valid link tag markup for
stylesheets , added consistent design class as per the modal in
integration text area.

integrationver.php - added same markup improvements like functions.

suggest.php - added javascript to upload download link as per the
version change from the dropdown.

filedownload.php - included for updating the download link.
valid markup update of script tags and link tags.
updated functions.php to remove the type parameter.
updated file to remove type parameter.
updated file to remove type parameter.
updated file to remove type parameter.
Update integrationver.php
Update filever.php
updated file to include download zip fix.
Deleting filedownload.php not required.
Update functions.php
Merge pull request #10 from nextroy/master

script tags and link tags markup update & download link bug fix.