Turtle code and diagrams for the envi and bldg examples

First version of BDLD and ENVI examples diagrams.

The code for the ENVI is left.

Added comments for op, dp and individuals.

Added isDefinedBy for reused entities

rdfs:comment added for all classes in envi

prefix is now s4bldg

Added
TTL and RDF/XML files with the provenance information to IFC in
BuildingSmart

Updates in requirements (needed to generate the provenance triples)

Updates in ENVI and BLDG diagrams

change prefix to s4envi
change axiom in PhysicalObject about contains

and the axiom in Device

first version of the bldg with axioms in classes.

real ranges and complex numbers should be refined.

First version of the bldg ontology including clases and properties

Added placeholders for comments.

Reviewed cardinalities.

Con los cambio de las restricciones globales y las cordialidades

Changed individuals to CamelCase.

Renamed some properties.
Added local restrictions to classes.

Added restrictions to System and Device.

Added local restrictions to PhysicalObject.

Added the SAREF namespace.
Removed some namespaces from SDH.

Some changes performed to the ontology to fix the error classes. However, Protege hangs when trying to load this ontology.

Raw RDF statements generated from GoogleRefine for the bldg extension.
No ontology added yet.