getOC V0.6.0

major update including:
- change query for L2 and L3 to use Common Metadata Repository (no delay between query required) increase considerably the speed
- add COPERNICUS and CREODIAS plateform queries for ESA satelittes:
        - OLCI reduced and full resolution L1
        - SLSTR (SST sentinel-3) full resolution L1
        - MSI (sentinel-2) full resolution L1C and L2A
- add url list to csv file, and download from url list, not image list

Author: guibourdin