Changes From The ASA Fork

Several changes made to the ASA Fork. Many of them were particular to what was needed for our usage (glos and storet). 

One of the bigger changes was the ISOWriter package added. It is designed to write out ISO 19115-2 files for sources by using the 'writeiso' command. See the [Sensor Web Harvester wiki](https://github.com/asascience-open/sensor-web-harvester/wiki) for more details about changes.