Looks like Google fixed their silly `<DOCTYPE>` misplacement.

git-svn-id: https://plugins.svn.wordpress.org/inline-google-spreadsheet-viewer/trunk@882410 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add `linkify` attribute to determine whether to run `make_clickable()`.

git-svn-id: https://plugins.svn.wordpress.org/inline-google-spreadsheet-viewer/trunk@882414 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update `readme.txt` file, version bump to 0.4.2.

git-svn-id: https://plugins.svn.wordpress.org/inline-google-spreadsheet-viewer/trunk@882416 b8457f37-d9ea-0310-8a92-e5e31aec5664