v0.2.15

• PATCH: new optional exports and fields, with no break. A family, a dimension or an input without them does not change.
• The new exports are ownerDimension, OwnerDimensionSpec, dimensionSupports, SupportedValues, SupportedRange, INVALIDATED_FIELD and portPoint.
• The new optional fields are CorpusDimension.supported, CorpusDimension.invalidates, CorpusFamily.hash, LayoutInput.invalidated and Port.along. resolveDimensions has a new optional fourth parameter by.
• supported marks the values that one family accepts (L51). A list is for an enum or a bool, and a range { min?, max? } is for a numeric dimension.
• resolve and generate of a registry refuse another value with a RangeError that has the text "not supported by". levelsOf and boundaryCells keep to the supported values.
• dimensionSupports(dim, value) tells a site if a family accepts a value.
• ownerDimension(name, spec) gives a dimension of one owner. It refuses a name of CORPUS_DIMENSIONS, the name kind and a bad default, level, supported or invalidates.
• invalidates lists the output fields that a value other than the default makes wrong. generate of a registry removes them, lists them in invalidated and calculates the hash again.
• Port.along fixes a port at a fraction of its side (L56). The start of left and right is the top end, and the start of top and bottom is the left end.
• checkInput refuses along without a side, outside [0, 1] or with x or y. turnPort changes along of left and right to 1 - along.
• Each input, manifest, record and hash of 0.2.14 stays the same. The tests pin the joint-v1 and joint-v2 manifests, RECT_SCATTERED_HASHES and an input with ports.