Remove .tmp extension from thumbnail and explain database structure change

README.md

@@ -9,7 +9,7 @@ TinyIB - A Lightweight and Efficient [Image Board](http://en.wikipedia.org/wiki/
 
 For demos see the [TinyIB Installations](https://github.com/tslocum/TinyIB/wiki) page.
 
-**Note to those who have recently upgraded:** Are you unable to create new posts?  Run the SQL on [this page](https://github.com/tslocum/TinyIB/wiki/NewSQLStructure) to finish the upgrade process.
+**Database structure was last modified on *7th Aug 2015*.** Are you unable to create new posts?  Run the SQL on [this page](https://github.com/tslocum/TinyIB/wiki/NewSQLStructure) to finish the upgrade process.
 
 Features
 ------------

imgboard.php

@@ -101,7 +101,7 @@ if (isset($_POST['message']) || isset($_POST['file'])) {
 		}
 
 		$post['file_hex'] = $service;
-		$temp_file = time() . substr(microtime(), 2, 3) . '.tmp';
+		$temp_file = time() . substr(microtime(), 2, 3);
 		$file_location = "thumb/" . $temp_file;
 		file_put_contents($file_location, file_get_contents($embed['thumbnail_url']));