Removed an import from BBMasksTest.java.
Created new testing file BBOperatorsTest.java
Completed the BBOperators.java init() and destroy() test functions in
BBOperatorsTest.java. Also, changed some error text output in
BBMasksTesta.java to reflect the class name changes.
Filled in setUpBeforeClass() and tearDownAfterClass() in
BBOperatorsTest.java. Removed some the setUp and tearDown methods for
before and after a single test.
Completed testShiftSouth() in BBOperatorsTest.java.
Also made initShiftSouth() private and removed its test function from
BBOperatorsTest.java.
Added a charShiftSouth function to BBOperatorsTest.java to assist in any
of the shift south functions.
Completed testShiftNorth() in BBOperatorsTest.java.
Added charShiftNorth() to assist in all the shift north functions.