Add rna_type method to Rna model
Add rna_type method to Rna model

This is the main entry point for finding the rna_type for a given
sequence. In addition I bump the date on the license file.

RNAcentral/rnacentral-webcode,RNAcentral/rnacentral-webcode,RNAcentral/rnacentral-webcode,RNAcentral/rnacentral-webcode