Refinement Release 1.1.1

Please note that due to Pypi stupidity, version 1.1.1.1 there is actually 1.1.1.

New or updated in this release:

• Removal of diagnostic information and updated testing/commit configurations, improving commit performance and bumping Pypy3 versions.
• Correction of ABC participation (and missing shallow copy method) for Pypy use of query fragments. #32
• Corrected $regex generation.
• Collation support.
• Passing an existing document (with _id key) to an ObjectId field will utilize the ID provided therein. #20
• Enhanced String field capabilities to include stripping and case conversion. #33
• Shared utcnow helper function.
• Improved documentation coverage.
• Improved generalized programers' representations.
• Improved query fragment merging.
• Corrected Reference field behaviours.
• Dead code removal.
• Updated Array and Embed field default value handling to reduce boilerplate.

Potentially backwards-incompatible changes:

• Simplification to only support a single referenced kind in complex fields such as Array and Embed. As multi-kind support was not fully implemented, this should not disrupt much.

New fields, including:

• Decimal — #23
• Period — Storage of dates rounded (floor) to their nearest period.
• Markdown — Rich storage of Markdown textual content. #34
• Path — Store a PurePosixPath as a string. #35

Traits are new, see #26, including:

• Collection — Isolating collection management semantics from the core Document class.
• Derived — Isolating subclass management and loading from the core Document class.
• Expires — Automated inclusion of TTL (time-to-live) field and index definitions, including expiry check on load.
• Identified — Isolation of primary key management from core Document class.
• Localized — Management of contained localizable top-level document content.
• Published — Management of publication/retraction and dedicated creation/modification times.
• Queryable — Encapsulation of collection-level record management. (Not an Active Record pattern.)