Fix FSSPEC Kwargs

• Fix using shared FSSPEC_CLIENT_KWARGS everywhere

Add options to skip empty data and station

• Add option to skip empty stations (option tidy must be set)
• Add option to drop empty rows (value is NaN) (option tidy must be set)

Add EA UK Hydrology API

• Add UKs Environment Agency hydrology API

Few fixes

• Fix acquisition of DWD weather phenomena data
• Set default encoding when reading data from DWD with pandas to 'latin1'
• Fix typo in EcccObservationResolution

Fix historical DWD radolan acquisition

• Fix acquisition of historical DWD radolan data that comes in archives

Few fixes

• Fix creation of empty DataFrame for missing station ids
• Fix creation of empty DataFrame for annual data

Revert skipping ssl verification

• Revert ssl option

Temporary fix for DWD server certificate

• Circumvent DWD server ssl certificate problem by temporary removing ssl verification

Add WSV Pegelonline

• Add implementation of WSV Pegelonline service
• Clean up code at several places
• Fix ECCC observations access

Fix values coercing

• Change integer dtypes in untidy format to float to prevent loosing information when converting units