Uploading v2.3.7.

git-svn-id: https://plugins.svn.wordpress.org/fetch-tweets/trunk@975944 b8457f37-d9ea-0310-8a92-e5e31aec5664
Marked 2.3.7 as stable.

git-svn-id: https://plugins.svn.wordpress.org/fetch-tweets/trunk@975946 b8457f37-d9ea-0310-8a92-e5e31aec5664