Using lazy match, and fixing cleaning in code

Code blocks as parsed by Markdown add attributes, which the
regex here wasn't catching, so it was updated. Also, it did not
match line breaks.

Greedy match might end up eating text that should be parsed if you
had more than one code block or blockquote in your post.

Fixes #69

library.js

@@ -240,11 +240,11 @@ Mentions.clean = function(input, isMarkdown, stripBlockquote, stripCode) {
 		return input;
 	}
 	if (stripBlockquote) {
-		var bqMatch = isMarkdown ? /^>.*$/gm : /^<blockquote>.*<\/blockquote>/gm;
+		var bqMatch = isMarkdown ? /^>.*$/gm : /^<blockquote>.*?<\/blockquote>/gm;
 		input = input.replace(bqMatch, '');
 	}
 	if (stripCode) {
-		var pfMatch = isMarkdown ? /`[^`\n]+`/gm : /<code>.*<\/code>/gm;
+		var pfMatch = isMarkdown ? /`[^`\n]+`/gm : /<code[\s\S]*?<\/code>/gm;
 		input = input.replace(pfMatch, '');
 	}