Changes

[Ref] Move entity loading optimization code into a separate package.
 (commit: 219fb73)

[Ref] Rename entity loading SPARQL assembly modifier and result loader that use unbound predicate and object.
 (commit: bffff4c)

[Enhancement #357] Implement query assembly enhancer that modifies query to select all attributes of the target type.
 (commit: f5836a6)

Extend ResultSet and ResultRow with a method to get column names.
 (commit: 77947cb)

[Enhancement #357] Implement loader of entities from query result specifying values for individual attributes.
 (commit: 723c253)

[Enhancement #357] Resolve and use entity loading query optimizer based on the expected result type.
 (commit: 6c48599)

[Enhancement #357] Test optimized entity query result loading.
 (commit: 6a78640)

[Enhancement #357] Prevent NPX when resolving entity type from axioms.

Fix loading values from result set rows.
 (commit: 149262d)

[Enhancement #357] Utilize descriptor to specify repository contexts in query modification.

Used by the AttributeEnumeratingSparqlAssemblyModifier.
 (commit: 146eac0)

[Enhancement #357] Support result type with subclasses in AttributeEnumeratingSparqlAssemblyModifier.
 (commit: aba4e2f)

[Enhancement #357] Improve documentation of the optimized loaders.
 (commit: a0d40f1)

[Enhancement #357] Fix incorrect code assertion.
 (commit: 09e5ab9)