Add support for a file name with directory separators.

git-svn-id: https://plugins.svn.wordpress.org/wp-syntax-download-extension/trunk@906753 b8457f37-d9ea-0310-8a92-e5e31aec5664
Suppress W3TC comment in raw/download output.

git-svn-id: https://plugins.svn.wordpress.org/wp-syntax-download-extension/trunk@906754 b8457f37-d9ea-0310-8a92-e5e31aec5664
Release version 1.1.1.

git-svn-id: https://plugins.svn.wordpress.org/wp-syntax-download-extension/trunk@906759 b8457f37-d9ea-0310-8a92-e5e31aec5664