Cleanup

See merge request documentation/docs/dev!933

Delete types.md

See merge request documentation/docs/dev!932

Delete index.md

See merge request documentation/docs/dev!931

documentation/docs/dev!931

per documentation/docs/dev#869

Remove legacy reference

See merge request documentation/docs/dev!930

I think this is dated out of helpfulness - it applied only to 3 versions over a year ago

My formatting fix overwrote documentation/docs/dev@f293ef4b -

- I've been self-merging the formatting ones but - fail

Reduce warning

See merge request documentation/docs/dev!928

fix links

See merge request documentation/docs/dev!927

More formatting, links

See merge request documentation/docs/dev!929

Seems overly long & repetitive & kinda blocks getting to 'the real stuff

Big update - the whole 'don't read this section is gone

See merge request documentation/docs/dev!926

Everything re-organised into one structure

Lots of formatting, proof reading, link fixing still needed

Remove all that old legacy ipn stuff

See merge request documentation/docs/dev!925

Update / consolidate information in the docs about the main payment class

See merge request documentation/docs/dev!924

Formatting fixes, add debit fields

See merge request documentation/docs/dev!921

Text update around intro

See merge request documentation/docs/dev!923

Clarifying that we now use deprecation notices for unset params.

See merge request documentation/docs/dev!922

I also removed the code saying what new code should do since I think the docs are ahead of reality there