Need Help with Theme!!!!!!

I downloaded this theme called Avenue but get this message-

"Broken Themes
The following themes are installed but incomplete. Themes must have a stylesheet and a template.
Name: avenue
Description: Template is missing."

Now I noticed that I managed to get it uploaded BUT now I get these messages,

"PHP Error Message

Warning: include_once(shortcodes.php) [function.include-once]: failed to open stream: No such file or directory in /home/a6348061/public_html/wp-content/themes/Avenue/functions.php on line 76

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PHP Error Message

Warning: include_once() [function.include]: Failed opening 'shortcodes.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/a6348061/public_html/wp-content/themes/Avenue/functions.php on line 76
"

So whats going on and how can I get this fixed and working 100%? Please help!