Methane Active Not Recruiting Phase 2 Trials for Stage IV Cutaneous Melanoma AJCC v6 and v7 / Stage IIIB Cutaneous Melanoma AJCC v7 / Stage III Cutaneous Melanoma AJCC v7 / Unresectable Melanoma / Stage IIIA Cutaneous Melanoma AJCC v7 / Stage IIIC Cutaneous Melanoma AJCC v7 Treatment