Contains functions to download, cache and read in 'Excel' version of the
RAM Legacy Stock Assessment Data Base, an online compilation of stock assessment
results for commercially exploited marine populations from around the world.
The database is named after Dr. Ransom A. Myers whose original stock-recruitment database,
is no longer being updated. More information about the database can be found at
< https://ramlegacy.org/>. Ricard, D., Minto, C., Jensen, O.P. and Baum, J.K. (2012)