Implemented DELETE and DISPLAY for ITEM table
Implemented INSERT for the LEADSINGER table
Implemented DELETE for LEADSINGER
Imlemented DISPLAY for LEADSINGER
Fixed conflict in itemTest.java
Implemnted INSERT and added a test file for HasSong
Implemented DELETE for HASSONG
Implemented DISPLAY for HasSong
Added checks for Item's type and category
Started populating tables.
Finished up basic table queries.
added method to return 2d array of table.
Merge pull request #3 from ellina-s/arjan

Arjan
Resolved conflicts with master
Merge pull request #4 from ellina-s/ellina

Ellina
Populated Tables for Testing
Merge pull request #5 from ellina-s/arjan

Populated Tables for Testing
Merge pull request #7 from ellina-s/clark

Clark
Daily Report GUI

Created a basic GUI for daily reports
Updated cmusic store to include more transactions.

Group by removed duplicates so that needs a fix.