Add more filetypes to preprocessor

[milesmcc]

Expected behavior: preprocessor has more filetypes Observed behavior: preprocessor only has a few filetypes Environment: n/a Screenshots or stacktraces: (insert below) We currently have the following filetypes detected (magic number => type string):

        "00 00 01 00" => "ico",
        "42 5A 68" => "bz2",
        "47 49 46 38 37 61" => "gif", // GIF87a
        "47 49 46 38 39 61" => "gif", // GIF89a
        "49 49 2A 00" => "tiff", // little endian
        "4D 4D 00 2A" => "tiff", // big endian
        "FF D8 FF" => "jpg", // this is not technically the spec
        "4D 5A" => "exe",
        "50 4B 03 04" => "zip",
        "50 4B 05 06" => "zip",
        "50 4B 07 08" => "zip",
        "52 61 72 21 1A 07 00" => "rar",
        "52 61 72 21 1A 07 01 00" => "rar",
        "7F 45 4C 46" => "ELF",
        "89 50 4E 47 0D 0A 1A 0A" => "png",
        "CA FE BA BE" => "class",
        "FE ED FA CE" => "MACH-O",
        "FE ED FA CF" => "MACH-O",
        "CE FA ED FE" => "MACH-O",
        "CF FA ED FE" => "MACH-O",
        "25 50 44 46" => "pdf",
        "24 53 44 49 30 30 30 31" => "sdi",
        "4F 67 67 53" => "ogg",
        "38 42 50 53" => "psd",
        "52 49 46 46 ?? ?? ?? ?? 57 41 56 45" => "wav",
        "52 49 46 46 ?? ?? ?? ?? 41 56 49 20" => "avi",
        "FF FB" => "mp3",
        "49 44 33" => "mp3",
        "42 4D" => "bmp",
        "43 44 30 30 31" => "iso",
        "4D 54 68 64" => "mid",
        "D0 CF 11 E0 A1 B1 1A E1" => "doc",
        "43 72 32 34" => "crx",
        "78 01 73 0D 62 62 60" => "dmg",
        "50 4D 4F 43 43 4D 4F 43" => "dat",
        "75 73 74 61 72 00 30 30" => "tar",
        "75 73 74 61 72 20 20 00" => "tar",
        "37 7A BC AF 27 1C" => "7z",
        "1F 8B" => "gz",
        "FD 37 7A 58 5A 00 00" => "xz",
        "04 22 4D 18" => "lz4",
        "77 4F 46 46" => "woff",
        "77 4F 46 32" => "woff2",
        "3C 3F 78 6D 6C 20" => "xml",
        "21 3C 61 72 63 68 3E" => "deb",
        "27 05 19 56" => "uboot",
        "7B 5C 72 74 66 31" => "rtf",

We should have more. Other notes: see List of file signatures for more magic numbers.