Rewrote questions B.1-2 in english.
Fixed question B.2
Wrote combine arrays question.
ArrayQuestions: corrected increment array.
GradeArrayQuestions: added incrementArray.
ArrayQuestions: fixed getArrayMin and getArrayMax return type.
GradeArrayQuestions: wrote grader for getArrayMin and getArrayMax.
Merge branch 'master' into answers
ArrayQuestions: should use UnansweredQuestionException.
Merged with master and wrote answers.
GradeArrayQuestions: wrote grader for sumArray.
Merge branch 'master' into answers
GradeArrayQuestions: added extra test for getArrayMax and getArrayMin.
Merge branch 'master' into answers