Restrict # of gifts & Invite button color change.

(1)Restrictions on gifts for free gifts only.
(a)Sender
One gift per customer per product for 30 days ( default unless the brand
wants to change it)-Done
We just hide the gift ( not show the same gift once the same user is
clicked)-Done
Ten gifts ( default is 10 or set by brand) per product within 30
days-Done
We just hide the gift ( not show the same gift once the limit is
exhausted)-Done
(b)Receiver
Can only receive one gift from anyone for that voucher ( within a 15 day
period or as specified by brand)-Done
We just hide the voucher once the recipient user is clicked to be sent a
gift-Done
Alok sir please update the products table with the below query to
restrict the sender and reciever for particular gift.
ALTER TABLE products ADD
sender_gift_limit int(11)NOT NULL DEFAULT'10',
ADD sender_time_limit int(11) NOT NULL DEFAULT'30',
ADD receiver_gift_limit int(11)NOT NULL DEFAULT'1',
ADD receiver_time_limit int(11)NOT NULL DEFAULT'15';
(c)Pagination by display order also has been done.
change the color code of invite friend.