Deprecated functions and variables for v1.0

[akabla]

This is to record functions and variables that are now deprecated - to be removed with version 1.0 of RHEOS.

When adding an item to this list, check that:

• docs are updated accordingly, and the docs/src/API.md links to the right functions.
• examples are updated accordingly

[akabla]

The functions onlytime, onlystress, onlystrain and onlyfreq now replace extract, which is deprecated.
#23

[akabla]

Function freezeparams replaces freeze_params.

[moustachio-belvedere]

Can we add a subtask to this list to update the API section of docs to add remove functions as needed?

[akabla]

Can we add a subtask to this list to update the API section of docs to add remove functions as needed?

Thanks Louis, this is definitely part of the workflow.

I think we should update the docs as soon as the new syntax is introduced, rather than when we remove the deprecated functions. This is to encourage the use of the new functions from now on. I already changed freezeparams. The doc exists for the others and example files have been updated too. I forgot indeed to change the API file of the doc... back on the list!