v3.6.0

Changes

• docs update @xnetcat (#1293)
• More output formats @xnetcat (#1244)
• Skip already downloaded songs before doing youtube search @xnetcat (#1287)
• Saved Songs Download and User Authentication @AZMCode (#1240)
• Remove FFmpeg normalization causing "quiet" songs. @phcreery (#1276)

Bug Fixes

• Artist songs fixes @xnetcat (#1284)
• Song matching improvements @xnetcat (#1279)
• Fix security risk @xnetcat (#1285)
• Use ffmpeg_path to check for version @aiden2480 (#1289)
• regenerate cassettes @xnetcat (#1290)
• Bump minimal required python version to 3.6.1 @xnetcat (#1278)
• ignore .cache and other hidden files @xnetcat (#1274)