New shortcode lets you insert Daily Moon Forecast on any post or page. Updated readme.txt, specified how to left-align the widget.

git-svn-id: http://plugins.svn.wordpress.org/daily-moon-forecast/trunk@792590 b8457f37-d9ea-0310-8a92-e5e31aec5664
Give new shortcode information.
bumped version to 1.3.4.1
bumped version 1.3.4.1