Show observation identifiers in capabilities only if the size is less than 100
- Add first/latest observation timestamp (all) and value (only Measurement) for an easier integration of the Timeseries API
  - Update these columns during insertion process
- Update SQL scripts
Add update SQL scripts from 4.0.1 to 4.02
Fix wrong column name in check attribute
Merge pull request #26 from CarstenHollmann/first_latest_time

Add SQL update scripts and fix wrong mapping definition in check attribute