removing old version

git-svn-id: https://plugins.svn.wordpress.org/wptouch/trunk@867145 b8457f37-d9ea-0310-8a92-e5e31aec5664
adding 3.1.8 update

git-svn-id: https://plugins.svn.wordpress.org/wptouch/trunk@867150 b8457f37-d9ea-0310-8a92-e5e31aec5664