Theme 2 Scenario 2A, Update usgs notebook

@Bobfrat lets keep this open, and i will be pushing changes to it. will note when complete
This loop is too complex and easily breakable (in fact I am having trouble to run it right now).  Maybe an abstraction to read the metadata is in hand.

Also the actual data and dates can be easily read with pandas and stored in the dictionary instead of the numpy array in the next cell.