Add number of subs to message to template

Add number of subs to message and added var that set level.

Need this db update:
INSERT INTO vars (name, value, description) VALUES
('subs_level','15','Level at which to not to display low submissions
message, set to 0 to diable message');
Updates to add subs_level var.

add subs_level to var table in database scripts
Spelling mistake
Merge pull request #105 from paulej72/low_sub_message_2

Change message to show what's in the hopper