Keypad works! Removed textboxes proper.

Edited Puzzle to remove printLn
Merge branch 'master' into nikhil, without all conflicting files

Conflicts:
	src/model/Cell.java
	src/model/Column.java
	src/model/Grid.java
	src/model/Puzzle.java
	src/model/PuzzleInterface.java
	src/model/Row.java
Deleting Puzzle.java coz github is retarded
Revert "Deleting Puzzle.java coz github is retarded"

This reverts commit cbdf9d2c860320fead14878e426113a422e9b3ca.
Updated diary
Deleted all model files
Added model files from master
Merge branch 'master' of https://github.com/nklsrh/COMP2911Project