Fix checkstyle warning about hiding instance field
Fix findbugs warning about doing string comparison by pointers
Replace N^2 matrix with ½ N^2 lower triangular matrix for memory savings
Fix dumb checkstyle warnings
Fix null pointer exception by swapping indices in lower triangular matrix
Ignore teams in max flow who are trivially eliminated
Add the grade for this version of BaseballElimination.java
Add instructor hints for baseball assignment
Add baseball assignment spec