Created model package. Added Stone and Order class
Updated class names
Implemented Order, Stone, Product, ProductListener, and Task. Added
basic fields onto every class. 

Product, ProductListener and Task should have its major methods fully
implemented.
Added TaskListener. setTaskStaus in products doesn't exist anymore, use
task.setStatus() instead.
Removed order details
Renamed TaskChanged to changed. Removed some unnecessary fields in
Product
Added equals to task
Added customer object
Added interface for orderlisteners.
Created and implemented order object.
Merge branch 'dev-model' of github.com:Farenheight/Lidkoping-SH into dev-model
Updated TestProduct
Added equals in Task
Merge remote-tracking branch 'origin/dev-model' into dev-model
Changed method name changed to productChanged in ProductListener and
changed to taskChanged i taskListener
Implemented Customer object
Merge branch 'dev-model' of github.com:Farenheight/Lidkoping-SH into dev-model
Updated with more tests. Added methods for adding and remove listeners
in Product
Merge remote-tracking branch 'origin/dev-model' into dev-model
Added getters to customer.