Streamline dictionary update process for morphodict

[fbanados]

Ensure documentation and process to update dictionary entries is both available and that it is consistent with the implementation

[fbanados]

Step 1 is documentation, being handled in https://github.com/UAlbertaALTLab/crk-db/pull/110

A draft of the process to discuss next week is here:

https://github.com/fbanados/crk-db/blob/update-db-docs/db-update.md