Added Material Table
Material Table Edit

Follow format of the data dictionary
Added Employee Table
Merge branch 'piaencar' of https://github.com/jackpotist/CS123 into jsantos16

Conflicts:
	JCarl Database.sql
Merge
Has both Supplier and Materials
Added purchase order and projects tables
Merge remote-tracking branch 'origin/master'
Merge branch 'master' of https://github.com/jackpotist/CS123 into samaco
revised the suppliers, added for_use for projects' materials
revised suppliers, added for_use -> project's materials