Moved discuss.php to /discuss, updated /include/constants.php accordingly.
Moved themizer.php to /themizer/index.php, updated include/constants.php.
Moved database.php to /database/index.php, updated /include/constants.php.
Moved Try-It to tryit/index.php, updated constants.php.
get_header() => get_header(1) and get_footer => get_footer(1) in database/index.php, discuss/index.php, themizer/index.php, and tryit/index.php.
Complete folder restructuring
Merge branch 'folder-structure'

Someone go check and make sure I didn't break anything. @txychen @knittingfrenzy18

Conflicts:
	database/index.php
	discuss/index.php
	js/themizer.js