Add top-level document for the May 2022 upgrade

See merge request !23

Update Unconfirmed Transaction Chain Limit CHIP to v1.2

See merge request !21

Source: https://github.com/SoftwareVerde/bitcoin-cash-chips

Add top-level document for the May 2021 upgrade

See merge request !20

As requested in !19 discussion.

Add May 2021 network upgrade

See merge request !19

Note these are simple mirrors of documents developed elsewhere. Please
submit feedback using the origin/discussion links. We will follow
upstream changes.

BCHN is committed to ship implementations of these proposals.

Add Double Spend Proofs specification

See merge request !18

This is already implemented in BCHN, see
https://docs.bitcoincashnode.org/doc/dsproof-implementation-notes/

Switch to document-level licensing

See merge request !17

This simplifies accomodating different documents with different license
terms.

add word

See merge request !14

Remove the section on rationale for using arithmetic bitshifting

See merge request !13

It has been deemed uninteresting and not necessary.

Bumps the minor version and updates the date.

Markdown formatting fixes

See merge request !11

Add November 2020 to menu

See merge request !10

[spec] Initial version of ASERT (aserti3-2d) difficulty algorithm specification

See merge request !7

November 2020 upgrade proposal

See merge request !8

Add link to BCHN implementation status

See merge request !9

Another Markdown fix

See merge request !6

Deploy specifications via GitLab Pages

See merge request !5

Add clarification about coinbase transaction: it always counts as 0

See merge request !4

Turn Github links into relative links

See merge request !3

Remove bitcoincashorg site files, leaving specs/, bitcoin.pdf, a README and COPYING

See merge request !1

Remove the Infrastructure Funding Plan from 15 May 2020 upgrade

See merge request !2