Version: v1.5 (Date: 2019-01-07)
Bug Fixes:  

Improvements(by request): 
-Now an order can be assigned to multiple tables, if there are lot of persons in a same order
-Now a table can have multiple orders, if the table is too large
-An order can be proceed without selecting table

New Features: 
Please add/replace these files to respective locations(create folder wherever needed):
application/controllers/Sale.php
application/models/Sale_model.php
application/views/sale/POS/main_screen.php
assets/POS/css/style.css
assets/POS/js/custom.js
assets/images/table_icon2.png

Please run these SQL in your Database:
CREATE TABLE `tbl_orders_table` (
  `id` bigint(50) NOT NULL,
  `persons` int(5) NOT NULL,
  `booking_time` datetime NOT NULL,
  `sale_id` int(10) NOT NULL,
  `sale_no` varchar(20) NOT NULL,
  `outlet_id` int(10) NOT NULL,
  `table_id` int(10) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
ALTER TABLE `tbl_orders_table`
  ADD PRIMARY KEY (`id`);
ALTER TABLE `tbl_orders_table`
  MODIFY `id` bigint(50) NOT NULL AUTO_INCREMENT;
COMMIT;
