Update RDAT file specs version

[rhiju]

RDAT format has been stable for several years now -- increment file format to 1.0? As a sanity check let's

• Download all RDAT's from RMDB
• Make sure all can be read in with Python3 code, and can get ANNOTATION field, number of sequences, and number of reactivity values into a single .csv file.
• Do same .csv output with MATLAB code and check agreement.
• Probably can deprecate TRACE.
• Write out an updated specification for RDAT format, and store in this GitHub README rarther than at RMDB

@tkaragianes