Validation & Bug fix

The closing </div> for <div id="medialist-page"> is within an if
statement (if ($search)) which is false on initial page load. Apart from
a validation error this causes the page structure to be wrong and the
footer to be incorrectly styled
Removed trailing white spaces resulting in extra <br>-tags, Removed line breaks inside lists resulting in extra <p>-tags in list item, Added some css to style markdown on admin page.
Merge pull request #100 from magicsunday/readme.md

Removed trailing white spaces resulting in extra <br>-tags, Removed line...
Merge pull request #99 from ddrury/medialist.php_bug_fix

Validation & Bug fix
Local changes
style optimization