Adjust menu page position

Changed menu position to avoid conflicts with other plugins.
Tested with subscribe2 because of known conflict.

From the codex: http://codex.wordpress.org/Function_Reference/add_menu_page
WARNING: if two menu items use the same position attribute, one of the items may be overwritten so that only one item displays! Risk of conflict can be reduced by using decimal instead of integer values, e.g. 63.3 instead of 63 (Note: Use quotes in code, IE '63.3').