Fixing tweet_counter bug + more options for 'np_pos'

git-svn-id: https://plugins.svn.wordpress.org/rotatingtweets/trunk@1018342 b8457f37-d9ea-0310-8a92-e5e31aec5664
Extra option for 'np_pos'

git-svn-id: https://plugins.svn.wordpress.org/rotatingtweets/trunk@1018343 b8457f37-d9ea-0310-8a92-e5e31aec5664