2.8.8; miscellaneous bug fixes, UI improvements, etc.

git-svn-id: https://plugins.svn.wordpress.org/wp-to-twitter/trunk@923224 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add base.js

git-svn-id: https://plugins.svn.wordpress.org/wp-to-twitter/trunk@923226 b8457f37-d9ea-0310-8a92-e5e31aec5664
Switch to 2.8.8 stable tag. Assorted bug fixes; localization; UI improvements; deprecated support for 3.5.x; translation updates.

git-svn-id: https://plugins.svn.wordpress.org/wp-to-twitter/trunk@923228 b8457f37-d9ea-0310-8a92-e5e31aec5664