First trial towards scalar field ring
Added ScalarFieldRing coercion depending on subdomains
ScalarField detached from TensorField
ScalarFieldRing inherits from UniqueRepresentation + more doc
First sketch of the tensor field modules
First sketch of vector fields and tensor fields, as module elements
VectorFrame is now a subclass of FreeModuleBasis
Added covering_charts and covering_frames to OpenDomain
Added methods is_manifestly_coordinate_domain and is_manifestly_parallelizable to class Domain
Rewritten rank-2 tensor fields as tensor module elements
Tensor fields as module elements (con't)
Updated Manifold and Domain doctests
Continued the rebasing of tensor fields on modules over the scalar field ring
Improved documentation
Added methods function(), multifunction(), coord_change() to class Chart; improved documentation
Rebase DiffMapping.pullback in the new module settings
Improved treatment of submanifolds
Class DiffMapping: renamed (domain1, domain2) to (domain, codomain)
Rebased vector/tensor fields on dest_map (destination map from the field domain)
Added exterior derivative to class DiffFormParal; improved scalar field documentation