rename .screenrc to screenrc

setup

@@ -5,5 +5,5 @@ dt=$(date -u +'%Y-%m-%dT%H.%M.%SZ')
 cd "$( dirname "$0" )"
 
 mv ~/.screenrc ~/.screenrc.$dt
-ln -s `pwd`/.screenrc ~/.screenrc
+ln -s `pwd`/screenrc ~/.screenrc