Function to detect the type of parameter (uri file or NIST object) and load it in the current NIST object

Update in the dump_record function. The IDC have to exist (even for the Type-01 record, consequence of the commit 652daf26). No need to check if idc < 0

First attempt to correct some field regarding the "ANSI/NIST-ITL 1-2011 Update: 2013 Traditional Encoding".

Add an IDC for Type-01, even if the NIST standard does not specify any IDC. For easier storage in the seld.data dictionnary