Added info to README.md

(Not ready for merging)

I think I have gotten basic functionality working (make FCS db, export tube type file, import [edited] tube type file, querydb for cases/files with specific tube type).

TODO:
- Make sure processing routine is working (....fix if needed)
- Migrate over to python package structure
- CEMENT code structure
- Add to querying function (include date range)
- Add documentation
- Add tests or queries
- Add tests or tube type functionality and fix bug whereby incorrect TubeTypes are not removed
- Merge back to master