supplier can view inventory

update the database to run
Just the skeleton code I finished from before

Have more to add later.
Revert "Just the skeleton code I finished from before"

This reverts commit 0d3838c850f98253bea58afbcde6565179467883.
Revert "Revert "Just the skeleton code I finished from before""

This reverts commit 740ac6b1d25be4d49b9cee52cd9cc3203a681504.
Created AddItem dialog

non-tested to see if functional, but it works..
supplier can add item

missing GUI part
Fixed bug in SupplierSys's jdialog call

Now successfully retrieves supplier's input as a sequence of strings
(item type, item, quantity, price respectively; temporarily stored in an
attribute called result in SupplierSys) of what to add to database.
additional comments

just additional comments
Created tests for the database class
Merge branch 'master' of https://github.com/truly-auto/SENG403
-Created item in addItem
-added skeleton for addItemToInventory in database
edited mac's commit because it broke the return value from modal dialog

the item type was specifically requested, not quite ready to add to db
yet, and the integer for the code/key we'll figure out after..
iteration 1 demo

supplier can add and modify items, supermarket can choose a supplier to
order from
Merged Erics code into the repo.
Refactor on inventory tab: used a different layout on the inventory tab
to make the code look less messy
Merge branch 'master' of https://github.com/truly-auto/SENG403

Conflicts:
	src/main/java/FoodLink/database.java
	src/main/java/FoodLink/gui/AddItem.java
	src/main/java/FoodLink/gui/SupplierSys.java
uploading some classes that were messed up

during the sync some errors got messed withh <<<<head and stuff