Acetylsalicylic acid Recruiting Phase 2 Trials for Stage III Cutaneous Melanoma AJCC v7 / Stage IV Cutaneous Melanoma / Stage IIIC Cutaneous Melanoma AJCC v7 / Stage III Cutaneous Melanoma / Stage IIIA Cutaneous Melanoma AJCC v7 / Stage IV Cutaneous Melanoma AJCC v6 and v7 / Stage IIIC Cutaneous Melanoma / Stage IIIB Cutaneous Melanoma / Stage IIIA Cutaneous Melanoma / Stage IIIB Cutaneous Melanoma AJCC v7 Treatment