前端銷售系統（POS）標準版

2016年09月14日

Rev. 1.5.4
- Fix column names in exported Inventory CSV
- Fix the compatibility with Android 6.

Rev. 1.5.3
Add data cleaning function.
Add supplier sorting for inventory
Add "Exit" button

Rev. 1.5.2
Fixed the UI of Purchased/Sold item adding screen

Rev. 1.5.0 / 1.5.1
Add searching in purchase
Add sorting in purchase

Rev. 1.4.9
Fix some bug of importing

Ver. 1.4.7
- Fix compatibility
- Fix date range

Ver. 1.4.6
- Fix the bug of selling return
- Added cash change