added a bit to get more accurate filelist retrieval - with additional info beyond author/year
finished loop for making one df with all timeseries (though not lined up). some code to align which doesn't work; removing after this commit
loop works but result too messy with all the date columns. added some print statements for debugging. new method tba: merge() replaces cbindPad()
added a test to check for anomalous data format (ka) and overlap of proxy with model period