Merge pull request #10 from 52North/develop

Develop
rename exception type 500
create test folder in api-doc with base64 test
amount values for parameter in service resource
some refactoring
prepare metadata property for timeseries data
update documenataion
count values for every resource entry
add time period configuration for preredering task
refactor
add first/last value to timeseries metadata
refactor a bit
formatting
update API doc
prepare Timeseries metadata for reference values
merged
Merge pull request #66 from ridoo/master

merge feature branches to main branch