ERPmine

Release Notes:

Features:
    - Cash flow report
    - Option to create product item when creating new model
    - Apply Tax rates for supplier invoice automatically
    - Consecutive serial numbers for new receipt page
    - Make more relationships of inventory
    - Hide used items in inventory items list

Bug fixes:
    - Allow only one receipt per supplier invoice
    - Error creating a new product item
    - The purchase order does not load when creating a new supplier invoice
    - Automatically calculate tax before saving invoice
    - Consecutive serial number does not load for old data
    - Product item name error in spend time
    - Plot the graphs for the current month