update tinyMCE, screenshots
Merge branch 'master' of github.com:zourbuth/wordpress-plugin into zourbuth-master

Conflicts:
	selz/index.php
	selz/readme.txt
	selz/screenshot-1.png
	selz/screenshot-2.png
	selz/shortcode.php
Merge branch 'zourbuth-master' into develop
Removed redundant readme (see WordPress) and resolved merge issues with shortcode.php