Decodes a file from Base64 representation. To encode a file use
^file.base64[]
If option $.strict(true) is specified the exception will be raised if all characters can not be decoded. Without this option an object will be created from the only charachers that are decoded successfully.[3.4.2] Detailed information on Base64 is available herehttp://www.ietf.org/rfc/rfc2045.txtand here http://en.wikipedia.org/wiki/Base64.