web classes

[TobiasB22]

The idea is to implement S3 classes for

• web
• weblist
• webarray

These classes should include a structure for storing additional attributes.

The attributes should be definable on a global level for higher and lower species of all webs in an array or list.
Such attributes might be the family of a species.

On the other hand, having the option to specify higher and lower attributes for each web / layer would be important.
Such attributes could be the abundances counted on each site of a multisite study.

For each web there should also be meta data available independent of the species.

The idea was to have a class inherited from array and enhance it with attributes and check during set and get.

Back and forth conversion to emln-style webs would also be nice.

[TobiasB22]

Create .default, .web, .weblist versions of methods that currently work with webs.
Default functions should internally create a web object and call the .web version afterwards.
Update help-files accordingly.

[TobiasB22]

All functions that already require a species specific attribute should be updated accordingly.
Other functions will stay untouched.