restructured diagrams, made jpgs, and populated README.md

See merge request !2

Update shapes/shapesDate.shex, shapes/shapesItemString.shex,...

See merge request !1

Update shapes/shapesDate.shex, shapes/shapesItemString.shex, shapes/shapesQuantity.shex, shapes/shapesItem.shex, diagrams/ksAgriculturalCollege_expandedWithValues.jpg, diagrams/ksAgriculturalCollege_abbreviatedNoValues.jpg, diagrams/ksAgriculturalCollege_abbreviatedWithValues.jpg, diagrams/ksAgriculturalCollege_expandedNoValues.jpg, diagrams/ksAgriculturalCollege_expandedWithValues.pdf, diagrams/ksAgriculturalCollege_expandedNoValues.pdf, diagrams/ksAgriculturalCollege_abbreviatedWithValues.pdf, diagrams/ksAgriculturalCollege_abbreviatedNoValues.pdf, diagrams/ksAgriculturalCollege_expandedWithValues.graphml, diagrams/ksAgriculturalCollege_abbreviatedWithValues.graphml, diagrams/ksAgriculturalCollege_abbreviatedNoValues.graphml, diagrams/ksAgriculturalCollege_expandedNoValues.graphml, diagrams/wd-general.graphml, diagrams/statement-datetime.graphml, diagrams/expandedPatternsV2.graphml, diagrams/abbreviatedPatternsV1.graphml, diagrams/abbreviatedPatternsV2.graphml, diagrams/expandedPatternsV1.graphml, diagrams/ref-without-qualifier.graphml, diagrams/qualifier-datetime.graphml, diagrams/qualifier-string.graphml, diagrams/quantityAsQualifier.graphml, diagrams/statement-quanity.graphml, diagrams/statement-string.graphml, shapes/README.md, patterns/README.md, diagrams/README.md