statspro 6.x-1.0-beta1

This is the "clean up issue queue" release. It completes the first step in Statistics Pro roadmap.

• #443950: include issue regarding open_basedir by suit4: requiring stastspro_views_handler_field_graph.inc only once in stastspro_views_handler_field_graph_trend.inc and using full path.
• #476308: Error when running cron by rsevero: including php version requirement in statspro.info file.
• Changed by rsevero: major code reformatting.
• task by rsevero: Changed statspro_uninstall() to delete all variables.
• bug #556046: Statistics Arrows by rsevero: Included info on trend arrows explaining they always refer to the line above. Some extra code reformatting also.
• task by rsevero: Incrementing the alt and title texts on the images that form the bar graphs.
• bug #682294: Duplicated records in statspro table by rsevero: Changed the 'day' column type in the 'statspro' table from 'timestamp' to 'date' to prevent the recording of more than one row per day.
• task by rsevero: Removed unnecessary TODOs.