#18 Add add_stat page

Not finished yet
#18 Finish add_stat page.

Should add a submit button.
#18 Add submit btn to add_stat page.
#18 Add the stat to the DB and show result.
#18 Add add_info page.
#18 Add form-group class
#18 finished add_info page.
#18 rename field_id to stat_id
#18 finished add_alarm_setting function.
merge admin_dashboard
#18 finished add_alarm page.