CIP-0072? | DApp Registration & Discovery (cardano-foundation#355)

* Initial draft for dapp registration certificate spec

* Init Draft CPS-0001

* Add Use Cases, improve descriptions

* Typo

* Generalizing CPS, simplifying problems and use cases. Add open questions

* Add type key for REGISTER & UPDATE. Define rules for calculting hash of the metadata object tree

* typoe fix

* mistake folder added in last commit

* Suggest metadata transaction labels for dapp registration and certification

* Suggest metadata structure, off chain storages up to the operators. Improvements in schema and release properties

* Refactor for more compliant header

* Removing permissionToAggregate

* Section for stores custom required metadata fields

* Better descriptive title

* Metadata links included in cert. Removing audits and simplify explanation

* Update CIP-0072/README.md

Co-authored-by: simonjohnthompson <s.j.thompson@kent.ac.uk>

* Update CIP-0072/README.md

Co-authored-by: simonjohnthompson <s.j.thompson@kent.ac.uk>

* Update CIP-0072/README.md

Co-authored-by: simonjohnthompson <s.j.thompson@kent.ac.uk>

* typos, structure adjustments and small prose adds

* Metadata links included in cert. Removing audits. Small refactoring

* specify size of hash

* Authors update

* Delete sample-cip26.md

* removing auditId

* Add logo to suggested metadata properties

* amendments based on comments / experience / feedback.

* re-intro website + added regex patterns.

* Update CIP-0072/README.md

Co-authored-by: Robert Phair <rphair@cosd.com>

* example fixes and adjusting to CIP template

* added placeholders

* added rationale section

* fixes in rationale section

* more rationale

* fixed on-chain signature scope

* categories

* typo fixes

* word wrapping test

* cosmetics

* cosmetics

* Path to Active

* more community comments

* Fixes according to feedback

* CIP version is mandatory, releases is optional, new algo to calculate signature

* signature generation: hex vs byte array clarification

* formatting fixes

* added version description and more decisions rationale

* typo fix

* Fixed patterns for hex strings, added changed DE-REGISTER to DE_REGISTER and added new DE_REGISTER_ALL, schema version changed from 04 to 2019-07.

* fixed several outdated things across CIP (ehanoc#16)

* removed several outdated things across CIP

* addressed all comments on initial commit

* Allow to express longer metadata URLs as an array of strings (ehanoc#17)

* latest changes as per last meeting agreements

* Update README.md

* Update README.md

* CDDL

* CDDL fix

* cosmetics

* initial categories update

* security_vulnerability field, added comment field in on-chain json and recommendation for keeping all past histories of off-chain snapshots.

* Update CIP-0072/README.md

Co-authored-by: Marcin Mazurek <marcin@mazurek.pro>

* latest comment fixes

* Apply suggestions from code review

Co-authored-by: Ryan Williams <44342099+Ryun1@users.noreply.github.com>

* changes according to the recent comments

* correction on Acceptance Criteria

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Co-authored-by: simonjohnthompson <s.j.thompson@kent.ac.uk>
Co-authored-by: Ryan Williams <rwilliams1@firstderivatives.com>
Co-authored-by: Mateusz Czeladka <mateusz.czeladka@cardanofoundation.org>
Co-authored-by: matiwinnetou <mateusz.szczap@gmail.com>
Co-authored-by: Robert Phair <rphair@cosd.com>
Co-authored-by: Volodymyr Hulchenko <57362128+vhulchenko-iohk@users.noreply.github.com>
Co-authored-by: Marcin Mazurek <marcin@mazurek.pro>
Co-authored-by: Matthias Benkort <5680256+KtorZ@users.noreply.github.com>
Co-authored-by: Ryan Williams <44342099+Ryun1@users.noreply.github.com>