Create Harvest_Landsat8_part1.py

Update MySQL database with new Landsat 8 imagery metadata retrieved from the USGS-EROS Archive.

# Retrieve Landsat8 Metadata from the USGS-EROS Archive
#  - save table in .csv format to disk space
# Read and format metadata from rows in .csv file (Landsat 8 Scenes)
# Update MySQL database with new Scene metadata
#  - insert data from .csv table into MySQL table
#  - set 'status' field to '0' to show newly added scene