Added MorenoB's commit in its correct format.
Corrected commit

Conflicts:
	src/main/java/org/nhl/containing_backend/Communication.java
	src/main/java/org/nhl/containing_backend/Controller.java
	src/main/java/org/nhl/containing_backend/Main.java
Small changes. Spelling errors fixed, printStackTraces added, static references made static
Merge pull request #9 from Rubykuby/commfix

Added MorenoB's commit in its correct format.
Added abstract ContainerHolder, implemented it in Transporter and Agv
Added documentation to Transporter
Added Storage class
Replaced setter statement with setter method
Added unit testing for Storage
Implemented ContainerHolder in Storage